Palynology and mycology as biological evidence in a homicide case

Criminal cases are studied from several disciplines to link a suspect with a criminal act. In this case, a man was reported missing in a coastal area in Buenos Aires Province, Argentina. The victim's relatives pointed to a possible suspect, and the local police carried out the investigation. We contributed to this research by applying palynological and mycological techniques. Palynomorphs and fungal spores offer valuable trace evidence, as they can be easily transferred between objects and crime scenes due to their minute size and persist on them for a long time. The victim was found 25 days later, lying on sandy soil, which partially covered the body, 35 km from where the suspect was arrested. Comparative samples were collected from the crime scene and the suspect's home and belongings (clothes, footwear, and seized vehicle). The palynological associations obtained from the crime scene and the defendant's belongings were dominated by diatoms and acritarchs (Acantomorphitae), all elements of marine origin, and a high CFU number of Bipolaris cynodontis, which allowed the defendant's clothing to be related to the place of corpse discovery. Soil from the defendant's home had an entirely continental composition, and the fungal biota was characteristic of prairie areas which were different from those of the crime scene.     

Touch DNA Collection Versus Firearm Fingerprinting: Comparing Evidence Production and Identification Outcomes

A project by a metropolitan police agency in 2008–2009 had police use touch DNA kits to collect cell samples from seized firearms. To assess outcomes, results of touch DNA swabbing of firearms were compared to fingerprinting firearm evidence. The rationale was that fingerprinting, as the older technology, was the baseline against which to compare touch DNA. But little is known about ways to measure touch DNA productivity compared to fingerprinting. To examine differences between the two requires comparable measurements. Two measures were used: quantity of probative or investigative evidence produced and identification outcomes. When applied to firearms seized within an Indianapolis, IN police district, touch DNA produced a larger volume of evidence than fingerprinting, but identification outcomes for the two methods were equal. Because touch DNA was deployed by police patrol officers, there are implications for firearm forensics and the choice of forensic approaches used by police.     

THE ESTABLISHMENT OF A POLICE GANG UNIT: AN EXAMINATION OF ORGANIZATIONAL AND ENVIRONMENTAL FACTORS*

Although researchers have begun to document the programs and activities performed by police gang units, little research has examined why police gang units are created and why they have responded to local gang problems in the way they have over the past 10 years. Using a multimethodological research design, the present study examines the factors that shaped a Midwestern police department's response to its community's gang problem. The results from the present study lend support for the institutional perspective. The data suggest that the gang unit was created as a consequence of pressures placed on the police department from various powerful elements within the community and that, once created, the unit's response was largely driven by its need to achieve and maintain organizational legitimacy.     

The potency of cannabis in New Zealand from 1976 to 1996.

The potency of cannabis plant and cannabis products seized in New Zealand over the period of 20 years is studied. The earlier part of the study includes mainly imported cannabis oil and cannabis resin, and both imported and locally grown cannabis plant, that was seized by the police. The later part of the study includes little imported material. Cannabis plant is now locally grown, cannabis oil is locally manufactured and imported cannabis resin is rarely seized. The average potency of the cannabis plant available to the user has not increased over the 20 years period. Cannabis leaf contains on average 1% THC and the female flowering heads on average 3.5% THC. The average potency of cannabis oil has dropped from its peak at 34% THC in 1985 to 13% THC in 1995.     

Police prejudice as a function of training and outgroup contact

A longitudinal study investigated prejudice among 412 New South Wales (Australia) police recruits. Recruits were tested on Beswick and Hills' (1972) Australian E scale and Ray's (1972) Balanced F scale at recruitment, after 6 months' full-time academy training, and after 12 months' police experimence. It was found that over the period of academy training recruits became less authoritarian but did not vary on ethnocentrism. Over the field experience stage recruits became both more ethnocentric and authoritarian. Further, recruits sent to districts with large Aboriginal populations became significantly more ethnocentric but no more authoritarian than other recruits. At a theoretical level, results suggest that police attributes may develop as a function of particular policing experiences. At an applied level, results suggest that training alone is unlikely to overcome the problem of police prejudice.     

Computer says no: technology and accountability in policing traffic stops

The Road Traffic Act 1988 gives police in the United Kingdom the power to seize motor vehicles which they have reasonable grounds for believing are being driven without a valid driver??s licence or motor insurance. Drivers may then have to pay a fee to have their vehicles returned. When exercising this power of seizure, the police may rely on information contained on the Police National Computer (PNC) which is linked to the National Insurance Database (NID). Whilst these databases are undoubtedly invaluable in this endeavour, they are not always accurate, and incidents have occurred whereby motorists who are in fact driving with valid insurance have had their vehicles seized and retained. Focusing on the case of Lisa, whose vehicle was wrongly impounded by Merseyside Police in 2007, and other cases, we explore the legitimacy and legality of such activity. We question both the discretionary power of the police in taking such action, and the validity of their (over) reliance on technology. We posit that the taking of money in cases such as Lisa??s is evidence of the turn within public policing towards marketisation, and consider the capacity for harm to innocent individuals and the implications for justice and fairness. Ultimately, we contend that police accountability is compromised and that a new approach is required. We close the piece with some recommendations for improved police practice.     

Forensic analysis of wooden safety matches -- a case study.

In this case, an individual was suspected of attempting to burn materials potentially relating to a murder case. A number of spent and unspent matches were seized at the scene by police for forensic examination. Coincidentally, a police raid at the suspect's house revealed a number of matchboxes, all of the same brand, containing matches that had a visual similarity to those recovered at the scene. Stable Isotope Profiling (SIP) was used to assess whether matches could either be distinguished or shown to be indistinguishable by 13C and 2H isotopic composition. These results were then compared to those from the X-ray diffraction (XRD) analysis of match heads and microscopy of the wood. SIP showed the scene matches and seized matches to be different, which was confirmed by XRD and microscopy analyses.     

You can lead a horse to water …: A case study of a police department's response to stricter drunk-driving laws

We present a case study illustrating the complexity of the process that determines how vigorously local police agencies enforce recent drunk-driving laws. Police enforcement practices are influenced most strongly by the play of local factors in a system of “games.” The local forces exerting greatest influence are 1) the local demand for drunk-driving enforcement, 2) the police leadership's priority for DUI enforcement, 3) the police leadership's capacity for command and control of the organization, and 4) the disposition of the local police culture regarding drunk driving and related work issues. In “Melville,” the study site, there is little external demand for drunk-driving enforcement, and police management tries to suppress it while making only symbolic gestures of support. Management's capacity to control street-level enforcement practices is limited, however, and a small cadre of officers generates a disproportionate number of arrests for personal financial gain (bounty), giving the department a much higher arrest rate than the department desires. Thus Melville's responsiveness to the state's drunk-driving law is not due to external political pressure or formal policy, but rather to the inability of local authorities to impose their will on street-level practices. Melville's case suggests that the degree to which police implement a new criminal law may be entirely independent of efforts to ensure political accountability and organizational control.     

Neighborhood and the Police: The People's Republic of China

The neighborhood police station of the People's Republic of China is examined as a form of self-policing. It is an expression of the PRC ideology that is not to be extrapolated directly to the circumstances of Western policing, but the neighborhood police station does illustrate the tendency of law enforcement to emphasize the vertical axis of the community that advances the interests of external power over service to the needs of the neighborhood as conceived by the residents. This conclusion is given substance by analysis of the neighborhood police station's functions in household registration and relationships with public security committees.     

Seizures of Clandestinely Produced Tablets in Santa Catarina,Brazil: The Increase in NPS from 2011 to 2017

Ecstasy is the name given to a large group of substances known as “club drugs” traded in the form of tablets, powder and liquid that present a varied composition, including mainly 3,4-methylenedioxymethamphetamine (MDMA) and analogous substances, in addition to the growing presence of new psychoactive substances. Based on this, clandestinely produced tablets (“ecstasy tablets”) seized by police in Santa Catarina in the period from 2011 to 2017 were analyzed. During the study period, 3472 seizures occurred, which resulted in total 498,443 tablets seized. Seventy nine substances were identified. In the year 2011, about 90% of the tablets contained MDMA. This number decreased to 66.6% in 2017. On the other hand, there was an increase in the number of tablets that mainly contained synthetic cathinones, as well as tryptamine and piperazine derivatives. Police seizures in the metropolitan region of Florianópolis and on the coast prevailed over the rest of the state.     

Muslim communities attitudes towards and recruitment into the British police service

Recent UK media reports have often portrayed Muslim communities in a negative light (Allen, 2010). Indeed, the frequent media focus of Muslim's being arrested for counter-terrorism offences have been reported in great length. Yet the Muslim community remains diverse and is one of the longest established UK communities within Britain. However, previous studies show that there remains a tense relationship with the police and Muslim communities (Awan, 2011) with negative attitudes held by many young British Muslims towards the police (Kundnani, 2009), and indeed negativity remains stronger from young people from minority ethnic communities. The focus and aim of this research was to gather perceptions from the Muslim community in Birmingham as regards whether they would choose or recommend a career within the police service. Thus the objective for the study was to try and get a better understanding of Muslim perceptions about police recruitment.This article reports on the findings and implications of a small-scale study conducted in 2011 comprising of interviews with two Muslim groups namely the Bangladeshi and Pakistani communities from Birmingham (in the UK), where 20 people were interviewed in four groups consisting of (5) participants. The categories included Young People (aged between 15 years and 18 years); Community Leaders; Mosque Representatives and Female Groups (aged between 18 years and 30 years) which aimed to identify and gather the views of Muslim communities in respect to their views about choosing a career with the police service. Analysis revealed that the Muslim community responded in a fairly homogeneous way: they had a lack of trust towards the police and also issues were raised about the legality of counter-terrorism policing operations; a perception that the police service were a racist organisation and that the police had failed to engage with the Muslim community in Birmingham which had left a negative experience of Muslim communities and the police.³ Recommendations to improve the image and recruitment into the police service include more pro-active work with local communities and the use of community policing as a means to reach out to otherwise ‘hard to reach groups’.     

Driving While Black

Abstract

The phenomenon of “driving while black” has ignited a heated debate: Do the police use race to target drivers? Most research on the topic compares the number of police stops and searches for a racial group to that group's distribution in the population. This approach ignores sociological theories of law, the driver's social status, the combined influence of race and sex, and whether the driver carries drugs in the car. In addition, the police are aware of being observed. To address these limitations, we surveyed undergraduates (N = 1,192) at one of the most diverse universities in the nation about their experiences with the police and their personal criminal behavior. Drawing on Black's (1976) theory of law, we examine whether a driver's race, sex, and social status influence police behavior (stop, exit, frisk, search, ticket/arrest). We also examine which drivers are most likely to have drugs in the car. The results suggest that a driver's race, sex, and social status all shape police behavior: African American men and Hispanic men experience more social control than white men; all men experience more social control than women; and low status drivers experience more social control than high status drivers. But despite the police focus on minority males, white males were the most likely to report carrying drugs in the car.     

Carbon and Nitrogen Stable Isotope Analyses of Ephedra Plant and Ephedrine Samples and Their Application For Methamphetamine Profiling

In this study, stable isotope ratio analysis was used to track the precursor information of methamphetamine. The δ¹³C and δ¹⁵N values of 30 nature ephedra plants, 12 synthetic ephedrine/pseudoephedrine (ephedrine), 14 natural ephedrine, and 987 seized methamphetamine samples were measured and compared. Due to different weather and earth conditions, the δ¹³C and δ¹⁵N values of ephedra plants grown in the east and the west of Inner Mongolia showed great difference. The δ¹⁵N values of ephedra plants were consistent with related ephedrine extracted from them. Moreover, the criteria to infer the synthetic origin of ephedrine were set up after the analysis of natural and synthetic ephedrine samples. Finally, the precursor origins of 949 seized methamphetamine samples synthesized by Emde and Nagai method were tentatively inferred. Influenced by different preprecursors, the δ¹³C values of seized methamphetamine samples that synthesized from P2P also showed great difference, and this result is consistent with the reported data.     

Extraction and isolation of cannabinoids from marijuana seizures and characterization by 1H NMR allied to chemometric tools

Marijuana, a drug derived from the Cannabis sativa L. plant, is the world's most consumed illicit drug. In this paper, a total of 156 marijuana samples seized in the state of Espírito Santo (ES), Brazil were studied and analysed by proton nuclear magnetic resonance (¹H NMR) spectroscopy to identify the major cannabinoids present. A crude extract of all samples was purified using high performance liquid chromatography so that these compounds could serve as reference substances. Nine fractions were obtained and analysed by ¹H NMR and gas chromatography–mass spectrometry (GC–MS), with five presented cannabinoids. ?⁹-THC (Δ⁹-trans-tetrahydrocannabinol), ?⁹-THCA (?⁹-tetrahydrocannabinolic acid), ?⁸-THC (?⁸-tetrahydrocannabinol), 11-hydroxycannabinol, CBV (cannabivarin), and CBN (cannabinol) were found, and their chemical structures were confirmed by GC–MS. The latter compound was obtained with high purity (≈100%), while the others were obtained as less complex mixtures with purity higher than 75% (except for Δ⁸-THC). Principal component analysis (PCA) was used on the ¹H NMR spectra of the 156 samples, and it was found that the samples were grouped according to the months, differentiating into two groups (from July 2014 to January 2015 and from February 2015 to July 2015), where non-grouping was observed from four macro-regions of the ES state (North, Central, Metropolitan, and South). The chemical profile of the seized samples was correlated to the ¹H NMR spectrum of an isolated CBN sub-fraction, in which the group formed by samples seized in the year 2015 presented lower CBN content in the chemical composition. From the PCA score plot, two groups of samples were confirmed using the partial least squares discriminant analysis and orthogonal projections to latent structures classification methods.     

Impact of deception detection errors on public's trust in the police

Purpose. The present study explored the public's attitude towards errors in police officers’ detection of deception. Based on findings on trust in the police after responses to terrorist threats, we predicted a positive influence of a correct credibility assessment and of a risk‐averse response bias of police officers on public's trust. Methods. A general population sample (N= 151) read a hypothetical scenario concerning a credibility judgment and indicated their trust in the officers making the judgment. Decision outcome was manipulated by varying the four outcomes of a signal‐detection task, namely, Hit, Miss, False Alarm, and Correct Rejection. Results. In line with findings on trust in the police following responses to terrorist threats, people trusted police officers more if they judged the credibility of a suspect correctly. Moreover, officers who disbelieved the suspect's statement were trusted more than officers who believed, independently of outcome correctness. Furthermore, this effect was moderated by individual differences in error weighting. Conclusions. In sum, these findings indicate that lie‐biased credibility judgments made by police officers are supported by the public and increase their trust in the police. In addition, the present findings suggest that an asymmetrical weighting of judgment errors is a relevant factor in explaining the development of and attitude towards lie bias.     

Citizen Review of the Police

Abstract

The research presents the summary and analysis of ten-year data (1991-2000) involving the People's Law Enforcement Board (PLEB). It describes the types of police officers and the police departments that had cases before the People's Law Enforcement Board (PLEB). It also examines the types of cases that were handled by these civilian review boards as well as the manner of dispositions of these cases, the number of times its decisions were affirmed, reversed, or modified by an appellate board, and the composition and qualifications of the members of the boards. The data indicate that the propensity of police officers for receiving complaints in the boards may be a function of both rank and assignment. The data also suggest that the PLEB tends to be lenient in its disposition of cases. However, the People's Law Enforcement Board appears to make good quality decisions as indicated by the appellate boards' upholding of PLEB decisions.     

Perceptions About Changing the MirandaWarnings Among Police Chiefs

Abstract

A number of studies have considered whether the race of a police officer influences police decision-making processes. The current study assesses whether a police chief's race influences perceptions about the Mirandawarnings. Police chiefs from the Commonwealth of Virginia completed questionnaires assessing various aspects about the Mirandawarnings when the fate of the warnings was to be determined by the Supreme Court. Results suggest that race only moderately influenced chiefs' perceptions. Implications are provided.     

Policing of Political Protest. The Security Police's Control of the Extra-parliamentary Opposition in Sweden During and after the Cold War

Throughout history, those in power have monitored and exercised control over individuals and groups who have been perceived as representing some form of threat to their power. Irrespective of the system of government in place, political crime is a matter of central interest to a society's security police. Political crimes are often committed by extra-parliamentary groups or organizations. The focus of this paper is how the Swedish secret police (SÄPO) have acted against what they have perceived as the extreme left, mainly anarchists and autonomists, during and after the cold war. Did SÄPO's perception of this part of the extra-parliamentary opposition change when the cold war was over in the early 1990s? Were these groups and individuals perceived as the new enemy in the threat vacuum that temporarily arose in the aftermath of the cold war? Furthermore, had the new security concept that was introduced at that time any impact on SÄPO's activities?     

The frequency and nature of resolution of potential police provoked shooting encounters

Helping people in acute psychiatric crisis has become an increasingly common part of modern community policing. In certain extreme cases, police may be faced with a suicidal individual who intends to intentionally provoke police to shoot them. While fatalities are fortunately rare, anecdotal reports from frontline police suggest that these kinds of encounters are occurring on a regular basis. This paper explores 2350 psychiatric crisis incidents over an eight-month period in Victoria, Australia, and assesses the frequency and nature of potential police-provoked shootings resolved through non-fatal means. Contextual factors relating to the person's behaviour and police responses, and the person's psychiatric and criminal histories were considered to elucidate characteristics common to these incidents. Results suggest that police are potentially encountering a person who is suicidal and trying to provoke police to shoot them more than twice a week. These individuals share a number of common characteristics with those who have been fatally shot in similar circumstances and are quite different from those who attempt self-inflicted suicide. Results are discussed in relation to the impact of previous criminal contact from both the suspect and police perspectives.     

Canteen Banter or Racism: is there a Relationship between Oslo Police's Use of Derogatory Terms and their Attitudes and Conduct towards Ethnic Minorities?

This paper explores the possible connection between the Oslo police's use of derogatory terms about the ethnic minority population, and actual police attitudes and conduct. The article's background is a research project focusing on the relationship between the police and Oslo's ethnic minorities. Qualitative methods were applied, including observations amongst rank‐and‐file officers in three police stations, interviews with 20 police officers of different rank and gender, as well as interviews with three samples of basically ethnic minority men. The background for the police's use of derogatory terms about the ethnic minority population is discussed, and possible institutional support is explored. The canteen language and attitudes towards ethnic minorities are seen in relationship to police experiences with them. Incidents observed during the field‐work are applied in the discussion of whether the police conduct may be influenced by their language and thus lead to unjustifiable targeting of ethnic minorities for stop and search. The observations of police conduct are perceived in the light of ethnic minority informants' police experiences. Although a direct connection between derogatory terms and actual conduct was not confirmed through the observations, the ethnic minority informant interviews suggest that such a connection may not be discarded and such language must therefore be avoided as it may increase the social distance between the police and ethnic minorities.