The value of DNA material recovered from crime scenes

Abstract:  DNA material is now collected routinely from crime scenes for a wide range of offenses and its timely processing is acknowledged as a key element to its success in solving crime. An analysis of the processing of approximately 1500 samples of DNA material recovered from the property crime offenses of residential burglary, commercial burglary, and theft of motor vehicle in Northamptonshire, U.K. during 2006 identified saliva and cigarette ends as the main sources of DNA recovered (approximately 63% of samples) with blood, cellular DNA, and chewing gum accounting for the remainder. The conversion of these DNA samples into DNA profiles and then into matches with offender profiles held on the U.K. National DNA database is considered in terms of the ease with which Crime Scene Examiners can recover DNA rich samples of different sources, the location of the DNA at the crime scene, and its mobility. A logistical regression of the DNA material recovered has revealed a number of predictors, other than timeliness, that greatly influence its conversion into a DNA profile. The most significant predictor was found to be Crime Scene Examiner accreditation with offense type and DNA sample condition also being relevant. A similar logistical regression of DNA samples profiled that produced a match with an offender on the U.K. National DNA database showed no significance with any of the predictors considered.     

The Relationship Between Deprivation and Forensic Opportunities with Stolen Vehicles

Abstract:  Collection and interpretation of forensic intelligence (primarily through DNA and fingerprint identifications) is an integral part of the investigation of criminal offenses ranging from burglary and vehicle crime to major crime. The forensic contribution depends not only on the successful recovery of material, but also the ability to identify potential offenders and apply this intelligence to solve the crime. This study examines burglary and vehicle crimes investigated by Northamptonshire Police (U.K.) by analyzing relationships between deprivation of a crime location and the recovery and identification of DNA and fingerprint material. The results show that, for stolen vehicles, although significantly more forensic material (both DNA and fingerprints) is recovered and identified in more deprived neighborhoods, this does not lead to a corresponding increase in solved cases. These findings are considered in relation to previous studies, which have advocated the prioritization of resources at crime scenes most likely to yield forensic material.     

Trace DNA Sampling Success from Evidence Items Commonly Encountered in Forensic Casework

Trace DNA analysis is a significant part of a forensic laboratory's workload. Knowing optimal sampling strategies and item success rates for particular item types can assist in evidence selection and examination processes and shorten turnaround times. In this study, forensic short tandem repeat (STR) casework results were reviewed to determine how often STR profiles suitable for comparison were obtained from “handler” and “wearer” areas of 764 items commonly submitted for examination. One hundred and fifty‐five (155) items obtained from volunteers were also sampled. Items were analyzed for best sampling location and strategy. For casework items, headwear and gloves provided the highest success rates. Experimentally, eyeglasses and earphones, T‐shirts, fabric gloves and watches provided the highest success rates. Eyeglasses and latex gloves provided optimal results if the entire surfaces were swabbed. In general, at least 10%, and up to 88% of all trace DNA analyses resulted in suitable STR profiles for comparison.     

The effects of deprivation on the time spent examining crime scenes and the recovery of DNA and fingerprints

DNA and fingerprint identifications are now accepted as an integral part of the investigation of a wide range of criminal offences from burglary and auto crime to serious and major crime. Despite this, there is still much variation between U.K. police forces in the recovery of fingerprint and DNA material from crime scenes. Analysis of burglary and auto crime data for Northamptonshire, U.K., during a 3-year period has enabled an examination of the relationship between the deprivation of the neighborhood in which the crime was committed and the level of service provided by Crime Scene Examiners. The results indicate that the time spent examining a crime scene for forensic evidence is not affected by the deprivation of the neighborhood. Further, there is no statistical significance between deprivation and the recovery of fingerprints from the crime scene. The relationship between deprivation and DNA recovery is, however, statistically significant with DNA being recovered more frequently from less deprived neighborhoods.     

A city-level analysis of property crime clearance rates

Theft, burglary, and vehicle theft are among the most frequently committed and least commonly cleared Part I offenses in the United States, but have received disproportionately little attention in the clearance literature. This study contributes to recent efforts to remedy this shortage by presenting offense-specific analyses of burglary, larceny, and vehicle theft clearance rates in a sample of 110 large US cities. Data were gathered from the Uniform Crime Report, the Law Enforcement Management and Administrative Statistics survey, and the American Community Survey. Independent variables comprised social disorganization measures (e.g. residential instability, poverty, etc.) and policing variables, including the use of broken windows policing. Although broken windows policing is related to higher clearance rates in a few prior studies, that effect was not observed in the present work. Racial diversity and police spending per capita (which were negatively associated with clearance rates) were the only variables that were significantly associated with the clearance of all three crimes.     

Generating a Vertebrae‐based Method to Discriminate between Korean and U.S. White Male Casualties from the Korean War,

Low recovery rate of intact crania in conflict‐related contexts necessitates the use of postcranial elements for ancestry estimation. This study aimed to develop a new method to discriminate between Korean and U.S. White casualties from the Korean War using vertebrae. Maximum body heights of C2 through L5 were measured from 75 Korean and 51 U.S. males to generate discriminant functions. U.S. vertebral heights were statistically greater than Koreans in 18 out of 23 vertebrae (C2, C4‐6, T3‐6, and T8‐L5). The functions with lumbar vertebrae tended to yield higher correct classification ratios (CCR) than those with cervical or thoracic vertebrae. Inclusion of the femur and tibia lengths in the vertebrae‐involved functions enhanced the CCR's. Discriminant functions using the femur and tibia length were also presented. The results of this study are expected to complement the current practices of the Defense POW/MIA Accounting Agency and the Ministry of National Defense Agency for KIA Recovery and Identification, which are primarily based on cranial and dental morphology.     

Exporting Gender Injustice: The Impact of the U.S. War on Drugs on Ecuadorian Women

Numerous researchers have documented the gendered impact of the United States’ domestic war against drugs. Women incarcerated for non-violent drug offenses are the fastest growing segment of America’s prison population because of the harsh penalties for using, selling and transporting illegal substances. The impact of U.S. drug policy on women in other countries, in contrast, has been overlooked. This paper argues that the greatly increased imprisonment of women in Ecuador for drug-related offenses is collateral damage of the U.S. war on drugs. The impact of the expansion of women’s imprisonment in Ecuador appears to be particularly damaging to the inmate’s children who frequently join their mother in prison. U.S. policy should not be exported to other countries before having a clear picture of the unintended negative consequences.     

Citizenship Status and Arrest Patterns for Violent and Narcotic-Related Offenses in Federal Judicial Districts along the U.S./Mexico Border

Media reports routinely reference the drug-related violence in Mexico, linking crime in communities along the Southwest U.S. Border to illegal immigrants. The primary purpose of the current research is to examine whether the media assertions can be supported. Logistic regression models were run to determine the impact of citizenship on the likelihood of disproportionate arrest for federal drug and violent crimes, along the U.S./Mexico border. In arrests for homicide, assault, robbery, and weapons offenses, U.S. citizens were disproportionately more likely than non-citizens to be arrested. The only federal crime where non-citizens were disproportionately more likely to be arrested than were U.S. citizens was for marijuana offenses. Results of the current study challenge the myth of the criminal immigrant.     

Toward a typology of sexual burglary: Latent class findings

Purpose

To understand fully the nature of residential burglary one must examine the situational context, and offender's behavior during the burglary. Although several behaviors appear to be distinctly related to sexual burglaries, including voyeurism, fetishism, sexual violence, and sexual murder, a systematic typology of the characteristics of residential sexual burglary is lacking. The purpose of the study was to develop a typology of residential sexual burglary.

Methods

The present study investigated 224 incidents of residential burglary with recorded sexual components. A typology classifying these incidents was developed using Latent Class Analysis.

Results

Three types of sexual burglary were identified. Fetishistic noncontact burglaries typically occurred in unoccupied houses and involve fetishistic behavior, but no theft, violence, and weapon. Versatile contact burglaries were characterized by rapes occurring in apartments and involving theft, violence, and weapon. Finally, perpetrators of sexually oriented contact burglaries raped their victim in houses but these incidents rarely involved theft, violence, or weapon. Previous offenses were also analyzed; the three distinct types of burglary appear to be embedded in different prior offense histories. The practical implications are discussed.

Conclusions

This research underscores the importance of examining the situational context and offender's behavior during a residential burglary with sexual components.     

The effects of patrol workloads and response strength on arrests at burglary emergencies

This study was concerned with response-related capture at residential burglary emergencies. Successfully catching burglars red-handed depended on response times, and particularly on numbers of units attending, as well as on incident characteristics. Response quickness and strength were influenced by the number of patrols available to respond, and this, in turn, reflected the workloads placed on patrols. Lighter workloads per patrol improved the chances of on-scene capture, though burglary circumstances determined the incidents at which this proved most promising. Stronger responses might offer scope for on-scene and near-scene capture at incidents with longer reporting delays than hitherto supposed. Findings were at odds with previous research, indicating that emergency response might be more effective than generally supposed in the U.K., if not in the U.S., particularly when calls were graded, units on patrol were matched to the incidence of emergencies, and single-crewed units could be used.     

AN EXPLORATION OF THE DETERMINANTS OF REPORTING CRIME TO THE POLICE IN THE CITY OF TIANJIN,CHINA*

Western research has investigated three types of correlates of crime reporting–victim‐specific (individual or household), incident‐specific, and environment‐specific variables. The current study applies this general, analytical framework to explore the determinants of crime reporting to the police in contemporary urban China. Using data collected from a recent survey of criminal victimization in Tianjin, we assess the determinants for reporting of robbery, assault, personal theft, and household burglary. The results consistently show that offense seriousness is a significant predictor of reporting for all offenses studied. Also, a nonlinear relationship between neighborhood disadvantage and reporting of burglary is found. In contrast, individual‐specific and household‐specific factors do not affect reporting, with the exception of a cumulative measure of victimization experience. Measures of neighborhood social cohesion and informal control are also not associated with reporting. The implications of these findings are discussed with reference to the unique neighborhood organizational infrastructure in urban China.     

The Analysis of a World War I U.S. Service Member's Dental Remains Recovered in France

In October 2009, the grave of an unknown World War I (WWI) U.S. service member was exhumed in Rembercourt‐Sur‐Mad Village, in the Lorraine Region of France. The skeletal remains and material evidence were accessioned into the Joint POW/MIA Accounting Command's (JPAC) Central Identification Laboratory (CIL). The personnel records for the associated casualty were requested, received, and reviewed. A dental profile was present among the service member's personal information. There were multiple points of concordance between the dental records of the associated casualty, and the recovered dental remains to include eight restored teeth, 15 unrestored teeth, and three antemortem missing teeth. Distinctive restorations which compared favorably included a porcelain crown and multiple gold foil fillings. All lines of evidence (historical, material evidence/personal effects, anthropological, and dental) and the circumstances of loss compared positively with the associated casualty. On April 1, 2010, the previously unaccounted‐for U.S. service member was positively identified and on June 23, 2010, was buried with full military honors at Arlington National Cemetery.     

The Role of DNA‐Stained Currency in Gang Robberies within the United Kingdom

Cash‐and‐valuables‐in‐transit (CViT) robberies have become a substantial problem—especially in the current global economy. Over £19.4 million were stolen in 2008 and £17.1 million in 2009 in the United Kingdom alone. The transportation of cash and valuable items between financial institutions has long been a target of robberies in the U.K. After a robbery has occurred, police collect evidence in the form of ink‐stained currency. These stained notes are submitted for analysis. Samples are subjected to polymerase chain reaction in order to amplify any possible botanically derived DNA markers present on the notes. After amplification, capillary electrophoresis allows for the deciphering of the “DNA profile.” The DNA profile is then linked to a particular cash box, and this information is compared with records of whether or not that box had been stolen. The cases below are three such instances where botanically marked currency was used to help solve robberies.     

The New Zealand DNA databank: its development and significance as a crime solving tool.

The New Zealand DNA Databank was established following the introduction of legislation in August 1996. Using the Second Generation Multiplex (SGM), DNA profiles from over 13,000 convicted offenders and volunteer donors have been completed to the National DNA Database. Since June 1998, DNA profiles from over 1,400 unsolved crimes have been entered onto the Crime Sample Database. Of all unsolved crimes analysed, 33% are linked to individuals and 21% are linked to other unsolved crimes. Several high profile types of case including homicides, sexual offenses and burglaries are amongst those regularly solved.     

Human trafficking: Better data, strategy, and reporting needed to enhance U.S. antitrafficking efforts abroad

The U.S. government estimates that 600,000 to 800,000 persons are trafficked across international borders annually; however such estimates of global human trafficking are questionable. The accuracy of the estimates is in doubt because of methodological weaknesses, gaps in data, and numerical discrepancies. For example, the U.S. government's estimate was developed by one person who did not document all of his work, so the estimate may not be replicable, casting doubt on its reliability. Moreover, the quality of existing country level data varies due to limited availability, reliability, and comparability. There is also a considerable discrepancy between the numbers of observed and estimated victims of human trafficking. The U.S. government has not yet established an effective mechanism for estimating the number of victims or for conducting ongoing analysis of trafficking related data that resides within various government agencies.     

Spouse Abuse and Child Abuse by Army Soldiers

This study analyzed data collected by the U.S. Army’s Family Advocacy Program, the group primarily responsible for family violence prevention, identification, evaluation, treatment, and follow-up on Army installations. Patterns of spouse abuse and child abuse perpetrated within a five year period (2000–2004) were examined in a sample of 10,864 Army Soldiers who were substantiated for family violence offenses. Three groups of family violence offenders were compared: (1) those who perpetrated spouse offenses only; (2) those who perpetrated child offenses only; and (3) those who perpetrated both spouse and child offenses. Results showed that the majority of substantiated family violence offenders were spouse offenders who had not committed child abuse (61%), followed by child offenders who had not committed spouse abuse (27%), and finally those who committed both spouse and child offenses (12%). The three groups of family violence offenders differed in terms of the types of abuse they perpetrated (neglect of children, emotional abuse, physical abuse, and sexual abuse), their experiences of being a spouse abuse victim, and sociodemographic characteristics. Twelve percent of all spouse abusers committed multiple spouse abuse incidents, and 10% of all child abusers committed multiple child abuse incidents.     

Examination of an altered bar code on a vehicle tax disc.

Altered vehicle excise licences (tax discs) are regularly submitted for questioned document examination in order to reveal the original vehicle details. A bar code printed on tax discs permits the electronic storage and transfer of vehicle licensing information. In a recent case involving a tax disc on which the printed serial number had been partially removed, it was possible to restore and manually decode an obliterated bar code. This allowed recovery of the complete serial number of the disc and subsequent retrieval of the original entries.     

Suicide behind bars: trends, inconsistencies, and practical implications

The results of two comprehensive approaches are compared: the nationwide surveys of suicides in U.S. jails by Hayes and the international meta-analyses of suicides in jails and prisons by Fazel et al. Factors are classified as demographic, situational, clinical, and methodical. More than 50% of U.S. jail suicide victims were men, white, unmarried, under 28 years of age, charged with minor or drug-related offenses, and intoxicated with drugs or alcohol. Suicides significantly occurred in isolation. Suicide victims in the international study were significantly (p < 0.001) men, white, married, pretrial, and charged with or convicted of violent offenses. Psychiatric diagnosis, alcohol abuse, taking psychotropic medication, and suicidal ideation were also positively correlated in the international study, but suicide victims were distributed more evenly over age-groups. Results of other studies illustrate the near universality of some findings. Three theories of suicide are briefly discussed.     

A comparison of educational processes at similar U. K. and U. S. institutions of higher learning

The structure and organization of the middle tier of higher education in similar institutions in the U. K. and U. S. are compared to draw conclusions on the effect which differences and similarities have upon the quality of the educational process, its cost-effectiveness, student independence and maturity, faculty load, relationships with business, industry and government.