Multiple homicides as a result of chloroform poisoning: case report and experimental study.

Two cases (involving five murder victims) of multiple homicide by inhalational chloroform intoxication are reported. In the discussion of the findings the valence of toxicological analyses is underlined with regard to the possibility of forcible external suffocation due to occlusion of the respiratory orifices by means of a chloroform-soaked soft covering. In addition storage experiments were performed at +4, +20 and -20 degrees C with cadaver blood mixed with chloroform. The optimal solution for avoiding volatile losses was stored in glass tubes with ground glass stoppers. In cases of unclear death in which involvement of volatile substances is suspected it is, therefore, advisable to preserve an additional blood sample at -20 degrees C in glass tubes that are only opened for the analysis of volatile substances.     

Triad-related homicides in Hong Kong

This study provides an overview of the first systematic research on triad-related homicide in a Chinese society. In the 10-year period from 1989 to 1998, 11.9% of all homicides or a total of 95 triad-related homicides were extracted from the Hong Kong Homicide Monitoring Database. These events resulted in 124 victims (13.2 percent of all victims) and involved 526 known offenders. Triad homicides were classified into various types based on different combinations of circumstances, motivation, and outcomes including unintended outcomes.     

Spousal homicides in contemporary Ghana

This study added to the scant extant literature on lethal marital violence in non-Western societies through the analysis of seventy-two spousal killings that were reported in a Ghanaian daily newspaper during 1990-2005. The findings showed that husbands were five times more likely to kill a spouse as were wives and that sexual jealousy and suspicions of infidelity were the most common precipitating factor in uxoricides. Mariticides were fueled by anger towards a husband who planned to take an additional wife, or by an instrumental need to replace a husband with a new lover. Analysis of data further revealed a predominance of poor and working class victims and assailants. The crime often occurred in the common dwelling place of the couple or a jointly-owned farm, or in cases involving separation, in the wife's natal home or farm. A plethora of methods were used to perpetrate the murders, including shooting with a gun, hacking with a cutlass or machete, hitting with a blunt object, and beating with personal weapons.     

Vigilante homicides in contemporary Ghana

This article provides a systematic analysis of vigilante homicides that occurred in Ghana, West Africa, during 1990-2000. Through the use of newspaper accounts, the study identified the socio-demographic characteristics of victims, spatial distribution, modus operandi, and the circumstances of death. The data suggested that young urban males suspected or accused of robbery, larceny, and other forms of theft were most often victims of vigilante killings. Mob attacks were spontaneous and the assaults involved the use of weapons available on the scene, such as stones, sticks, clubs, and personal weapons. Factors contributing to the escalation of vigilantism in the society included an under-resourced police force, poor police-civilian relations, burgeoning crime rate, a slow and overburdened judiciary, heightened public fear of crime, and a breakdown in traditional methods of dispute resolution. The article also reports on a survey that targeted the attitudes of a sample of law enforcement officers towards vigilantism in Ghana.     

Prostitute homicides: a descriptive study

It has been estimated that women involved in street prostitution are 60 to 100 times more likely to be murdered than are nonprostitute females. In addition, homicides of prostitutes are notoriously difficult to investigate and, as such, many cases remain unsolved. Despite this large risk factor, little literature exists on homicides of prostitutes, and there is a lack of basic statistics and knowledge regarding this very specific victim group that could possibly help investigators. The aim of the current study is to conduct an exploratory study to explore the key characteristics of this group and how they differ from other subgroups of homicide. Forty-six cases of U.K. prostitute homicides are analyzed and compared to 59 male offender-female victim nonsexual homicide cases and 17 male offender-female victim sexual homicide cases.     

State background checks and firearms homicides

This study examined the relationship between state firearms homicides and background checks for firearms purchases. Controlling for economic and social conditions, the estimated number of firearms in circulation, offenders under community supervision, and violent crime it was found that states with less stringent background checks on firearms purchases were significantly associated with firearms homicides. The large number of firearms circulating within the United States makes it likely that a motivated—but ineligible—person could obtain a firearm over the long-term in the secondary firearms market. Effective state background checks, however, may temporarily frustrate an unauthorized person from obtaining a firearm that, in turn, may contribute to lower firearms homicide rates. Implications for further research are examined.     

Self-defense injuries in homicides caused by penetrating forces

101 homicides caused by stabbing were examined for the presence of defence-injuries. 50 victims showed 174 defence-injuries on hands and forearms (133 incision wounds, 26 stab wounds and 15 cutting through). More than two thirds of lesions were found on left arm. That those lesions mostly were found on left arm is caused by the interaction between perpetrator and victim. Victims left arm is nearest to the perpetrator therefore it is used as a mean of defence first of all. The probability that defence-injuries can be seen is rising with the number of stab wounds. Localisation of a defence-injury on the extensor side ("passive") or on the flexor side ("active") is conditioned by accidentalities. Such a differentiation should be given up because no conclusions on the readiness of defence can be drawn.     

Colchicine poisoning: case report of two homicides

Deaths resulting from the oral ingestion of colchicine are occasionally associated with suicides and therapeutic toxicity. However, homicidal deaths in which this drug is used are extremely rare. Two homicides in which colchicine was used are reported.     

A typology of homicides committed by youth groups

Based on a complete survey of homicides committed by young people between the age of 14 and 21 (juvenile and adolescent offenders) in the German state of Brandenburg during a period of 10 years, two typologies are presented to describe homicidal acts. The first typology is based on motivation and identifies the basic social attitude of the offender manifested in the concrete offence, whereas the typology based on group context deals with the social conditions influencing the offender in his actions in the youth group. Both are supported by comprehensive data regarding the personal and social circumstances of the offenders and offences. In the typology based on motivation, our study distinguishes between homicide committed out of conviction, homicide due to the social background and homicide for egoistic reasons in order to satisfy a sudden urge in an overpowering situation. In the typology based on group context, a distinction is made between solo and group offences with the latter being subdivided into emotional/non-emotional and planned/ unplanned acts. By typologizing offences according to motivation, perpetrators can be categorized according to their affiliation with a certain milieu and their emotional and ideological disposition. Contrary to conventional criminological studies, the typology according to group context suggests a high percentage of group-based violent crime, which has so far been described on the margin only.     

Investigation of homicides interred in concrete--the Los Angeles experience

Decedents interred in concrete present unique problems and investigation of these deaths necessitates a team of forensic specialists. The Los Angeles County Department of Coroner has had five such deaths in the past 18 years. The buried cases needed layer-by-layer excavation to establish the time and cause of death. Metal detectors are often used in this process. X-rays of the interred remains were completed to help with locating the decedent's position in the concrete. The breaking of concrete in some of the cases required the use of a sledgehammer and later a chisel in a manner that would not damage the remains. Postmortem dismemberment was frequent in our cases. The decedents were all female or prepubescent children, and the perpetrators were closely related to the decedents. While concrete can interfere with determination of postmortem interval, it can also preserve the remains and assist with identification.     

Deaths at the workplace. Accidents or homicides?

The medical examiner is responsible for certifying and determining the cause of death of any person dying from criminal violence, accident, suicide, when unattended by a physician, in police custody, or in any suspicious or unusual manner. A less well-recognized, but no less important, responsibility of the medical examiner is the investigation of deaths of individuals who die at the workplace. The manner of death of most job-related fatalities has been traditionally classified as accidental. In recent times, prosecutors have scrutinized these cases more carefully. The results of some investigations have prompted them to bring criminal charges against employers for blatant negligence that contributed directly to injuries and deaths of employees. This paper is devoted to a review of the controversy surrounding the issue of industrial homicide, illustrative cases, and the role of the medical examiner in the investigation of deaths at the workplace.     

Adolescent homicides in Finland: offence and offender characteristics

Approximately 9% of the homicides in Finland are committed by adolescents under 20 years of age. The purpose of this study was to investigate the offence and offender characteristics in homicidal adolescents. Forensic psychiatric evaluation statements of adolescent offenders accused of a homicide during 1990-2001 were reviewed retrospectively (n=57). In 38% of the cases, there were multiple offenders. In 58% of the cases, the victim was an acquaintance, in 25% a stranger, in 12% a family member and in 5% of the cases an (ex)intimate partner. Sixty-nine percent of the offenders were intoxicated and 21% under the influence of drugs at the time of the killing. The most frequent motives were an argument (25%) and a robbery (25%). Sixty-four percent of the offenders had developmental problems and 42% had a crime history. Approximately half were diagnosed as having a conduct or a personality disorder, but 32% of the offenders were considered not to suffer from a mental illness or substance abuse. For 63%, the level of intellectual functioning was average or above average. There were signs of more than one form of violence in 54% of the cases and 28% of the cases contained excessive violence. The use of multiple and excessive violence was significantly related to the offender age, multiple offenders, offender-victim relationship and substance abuse, but not related to having developmental problems, crime history or mental illness.     

The happy land homicides: 87 deaths due to smoke inhalation

We reviewed all 87 deaths from the Happy Land Social Club fire. All deaths were due to smoke inhalation. The carboxyhemoglobin (COHb) concentrations ranged from 37 to 93% with a mean of 76.5%. The vast majority (97%) of the decedents had a COHb concentration over 50%. Cyanide blood concentrations ranged from 0 to 5.5 mg/L with a mean of 2.2 mg/L. Nine decedents had no cyanide detected, and seven had cyanide concentrations of less than 1 mg/L. Fewer than one third of the decedents had thermal injuries, and most were partial thickness burns involving less than 20% body surface area. Ethanol was detected in 72% of decedents with a range of 0.01 to 0.29 g% and a mean blood concentration of 0.11 g%. Cocaine or cannabinoid use was identified in 9% of the decedents. All decedents were visually identified, and all had soot in the airway extending to the major bronchi. Carboxyhemoglobin concentrations corresponded well with deaths from smoke inhalation. Cyanide concentrations did not correspond with the extent of smoke inhalation, and the role of cyanide in contributing to these deaths is doubtful. Hydrogen chloride inhalation, as evidenced by comparison of the pH of tracheal mucosa to controls, was not a factor.     

Inmate homicides: Killers, victims, motives, and circumstances

Despite popular media depictions, prison homicides are quite infrequent, averaging only four per one hundred thousand inmates annually in U.S. prisons during the current decade and declining over 90 percent in the past thirty years. Only a handful of studies had examined this most serious form of institutional violence. This study examined thirty-five inmate homicides, involving fifty-two perpetrators, occurring in the Texas Department of Criminal Justice for 2000-2008. The majority of homicides occurred in inmates’ cells, involved a single assailant, resulted from beatings, or was cross-racial. Often multiple motivations for the homicides were present. Hispanic inmates were overrepresented as perpetrators and victims. Perpetrators and victims were overwhelmingly male, and likely to have records of violent arrests and problematic prison adjustments. A substantial proportion of both perpetrators and victims had suspected or confirmed gang affiliations. Perpetrators were differentiated from victims by younger age, higher IQ scores, greater educational attainment, and sentences for armed robbery.     

Sex, race/ethnicity, and context in school-associated student homicides

This study assessed the importance of sex, race/ethnicity, and geographic context for incidents of school-associated student homicides between July 1, 1994 and June 30, 1999, covering 5 academic years. Using data from the Centers for Disease Control and Prevention School Associated Violent Deaths Study (n = 125 incidents), we compared percentages and medians of victim, offender, motive, and school characteristics for incidents by geographic context and race/ethnicity of the offenders. Most incidents involved urban areas (53.6%), Black and Latino offenders and victims, moderately high youth poverty, and male on male violence (77.6%) driven by disputes and gang-related motives. Suburban area incidents (31.2%) often involved offenders and victims of a different race/ethnicity (51.3%). Multiple victims and White offenders were more common in rural areas (15.2%). More than 50% of the rural incidents involved male offenders and female victims. White offender incidents more often included multiple victims and female victims while Black and Latino offenders more often included single victims of the same sex. These results emphasize the utility of an incident-based analysis of school-associated student homicides in highlighting important variations by intersections of sex, race/ethnicity, and geographic context.     

The application of lead isotope analysis to bullet individualization in two homicides.

Bullets were characterized by lead isotope ratio analysis and trace element analysis in two homicides. In one case, we concluded that a fatal bullet did not share a common origin with bullets in a box of ammunition containing 24 cartridges taken from suspects. Evidence in the second case included two bullets from the crime scene and 163 bullets taken from various suspects. We were able to infer that the two bullets from the crime scene did not share a common origin and that they differed from all of the bullets taken from suspects. All of the suspects' ammunition had been reloaded as was evident both from trace and isotopic analysis and, indeed, from visual inspection.     

Assessment of methods of homicides in a Brazilian city: a preliminary study

Homicides in the city of Ribeir?o Preto, state of S?o Paulo, Brazil, were analyzed with regard to methods (firearms or others) and gender, in a retrospective study from 1993 to 1997. There was a progressive increase in the number of homicides, mainly after 1995, with an increment of 86.6% in 1997 in comparison to 1993. The incidence of homicides was higher among males, with firearms being the most common method in this group since 1993. In addition, a 10% increase in this method was observed since 1995, in association with a proportional reduction in the use of other methods. The incidence of homicides among females remained stable until 1996 and increased by 51.3% in 1997. Simultaneously, firearms have become the most common method among female victims (71.4%), pattern similar to that observed among males. Attention is drawn to the social and economic conditions and their relationships with drug traffic in the city.