Cold floor effects on homicide

The cold floor pattern (a lack of homicides on days with extremely cold temperatures that was found by Cheatwood in Baltimore) is to be expected by chance. Under a model in which the number of homicides and the maximum temperature are independent, the probability that a day will fall below the cold floor is small. The Baltimore data do not support a model in which extremely cold weather suppresses human aggression.     

Urban homicide: Still the same

We use 1984–1986 data to estimate lifetime risks of being murdered in each of 50 large American cities and then compare these projections to others made earlier from 1971–1972 and 1976–1977 data. We find strong constancy over time in the average urban resident's murder risk (essentially a 1 in 68 chance of eventually being slain). Moreover, we find a high stability in the dispersion of risk by region, race, and city size and in the relative rankings of the 50 cities by murder risk. We comment briefly about such recent phenomena as the proliferation of crack and the resumption of capital punishment.Throughout this paper, we use the words murder, homicide, killing, and slaying interchangeably, meaning in all cases murder and nonnegligent manslaughter as defined by the FBI.     

Temporal regularities in homicide: Cycles,seasons, and autoregression

It has long been assumed that there exists a relationship between crime (including homicide) and season. After discussing three analytic approaches to this problem (looking for seasonality, a general autoregressive process, and cycles), we review the literature and show that confusing and conflicting findings have been reported about the temporal regularities of homicide. Employing monthly data from the Supplementary Homicide Reports (1976–1989), we find evidence for seasonality, autoregression, and cyclicality of homicide. Our modeling approaches clarify the previous conflicting research; implications for theory and future research are discussed.The data utilized in this study were made available by the Inter-University Consortium for Political and Social Research. The data originally were collected by the Federal Bureau of Investigation. Neither the collector of the original data nor the Consortium bears any responsibility for the analyses or interpretations presented here. The authors contributed equally to this article.     

Twenty years of homicide and robbery in Chicago: The impact of the city's changing racial and age composition

Uniform Crime Reports (UCR) arrest and offense data for Chicago for 1960 to 1980 and population data from the 1960, 1970, and 1980 censuses are used to assess the extent to which demographic changes help explain trends in the city's homicide and robbery arrests. The results indicate that a changing racial composition contributed to changes in the age composition of Chicago's population as well as to changes in the homicide rate. Age-specific analysis by race and gender suggests that as much as 24% of the total increase in homicide arrests and 45% of the increase in robbery arrests (from 1962 to 1980) can be attributed to an increase in the number of nonwhite men in the population. Increasedrates of arrest of nonwhite men appear to account for large parts of the increases in homicide and robbery arrests, with increased rates for white men and nonwhite women also accounting for some of these increases. The paper closes with a discussion of the issues raised by these trends for Chicago and other urban areas.Revision of a paper presented at the 1984 Annual Meeting of the American Society of Criminology, Cincinnati.     

Stranger sexual homicide: an exploratory behavioural analysis of offender crime scene actions

ABSTRACT

This study explores the role and function of homicidal and sexual violence in cases of stranger sexual homicide. The aim was to determine whether the instrumental/expressive hypothesis of physical violence and the overt/covert hypothesis of sexual violence applies to this crime. The method involved an analysis of the crime scene actions of 81 British stranger sexual killers using multidimensional scaling. Results suggest the instrumental/expressive hypothesis of physical violence and the overt/covert hypothesis of sexual violence does apply to stranger sexual homicide but they manifest as instrumental/overt and expressive/covert superordinate themes comprising four sub-themes reflecting rape, impersonal sexual assault, overkill and control. Although these superordinate themes can explain some stranger sexual homicides, a key hypothesis of this study is that the four sub-themes can also combine into different superordinate themes, knowledge of which can aid our understanding of this serious and deviant form of interpersonal violence.     

Journey to murder: examining the correlates of criminal mobility in sexual homicide

Although the empirical research on the journey to crime seems to indicate that most crimes are committed close to home, only a few studies have specifically examined the journey to crime in cases of sexual homicide. Using a sample of 214 sexual homicide cases, the current study investigates, using logistic regression, offenders who travel during the crime to those offenders who commit their crime, all at the same location. Current findings suggest that sexual murderers who engage in intra-crime travel tend to use a vehicle in the commission of their offence, target adult victims who are involved in the sex trade and move the body post murder.     

Spatial patterns of homicide and political legitimacy in Europe*

Political legitimacy, or a state's “right to rule,” has been a concern for philosophers, political scientists, and sociologists for centuries. This paper examines the relationship between European states' level of political legitimacy and violence, as represented by their homicide rate. It is theorized that political illegitimacy affects homicide through deteriorating social institutions of control, violating the rules of reciprocity between the state and citizens, and/or creating an environment of “virtual statelessness” that encourages methods of “self-help.” Focusing on the modernized societies of Europe, where legitimacy may be more important to maintaining order, the present study reveals two important findings: political legitimate states have significantly lower levels of homicide, and high and low homicide rates in Europe are significantly clustered among post-Soviet states (high) and Western Europe (low).     

Exploring the consequences of erratic data reporting for cross-national research on homicide

This paper examines the common practice in cross-national research on homicide of using crime estimates for a multiyear period based on a smaller number of years than theoretically desired because of erratic data reporting for selected nations. Correlations between hypothetical baseline rates and various alternative estimates are examined to simulate the potential consequences of using temporally incomplete data rather than data for the full multiyear period of interest. The results reveal that this common practice is likely to be highly acceptable for certain national samples but less acceptable for others. The paper concludes with suggestions for dealing with potentially problematic cases.     

Understanding sexual homicide

Abstract

Sexual homicide is a crime that receives much media attention, but one that still has a relatively small research base compared to other crimes. Although the idea of someone deriving sexual gratification from or during the killing of another is an anathema to many, forensic professionals need to understand sexual homicide and the range of circumstances and motivations that lie behind it. This paper explores this complex crime: it illustrates the various definitions and labels used; it suggests that sexual homicide is rare and is committed by individuals who, although having troubled histories, may not differ from other offenders. Then, by examining the various legal and behavioural circumstances in which sexual homicide can occur, this paper illustrates the diversity of sexual homicide and presents it in a more understandable manner. Finally, the paper suggests that knowledge of this diversity is required both for investigative and clinical purposes.     

116例女性杀人案件法医学分析

本文通过对1993~2014年连云港地区116例女性杀人案件的受害人年龄分布、嫌疑人与受害人关系、现场特征、损伤工具及致命伤位置等进行统计分析,发现男女性之间由于心理、生理特征和性格等多种因素的影响,女性杀人案件呈现出自身特点:女犯罪嫌疑人与被害人的关系多为家庭内部成员,尤以夫妻或男女朋友居多;现场常位于室内,以卧室居多;工具多是居家常用的生产或生活用具;多选择受害人熟睡、酒后时作案,采用窒息、投毒、溺水等方式;损伤集中于要害部位,分布范围集中,打击次数多,致命性损伤、濒死伤和死后损伤多。     

Murderer vs investigator: factors influencing the resolution of sexual homicide cases

ABSTRACT

The objective of this study was to identify the factors associated with the duration of criminal investigations and determine whether these factors influence the seriality of sexual murderers. To this end, data on the investigation of 62 sexual homicides (homicides committed by a serial sexual murderer = 24; homicides committed by a nonserial sexual murderer = 38), were analyzed. Organized behaviors, typical of serial sexual murderers, were not all associated with a longer criminal investigation. However, it was possible to develop a model of the duration of investigations, and predict the seriality of sexual murderers, by taking into account the decisions of murderers and investigators.     

Criminal homicide and the elderly offender: A theoretical and empirical analysis

This paper theoretically develops and empirically tests factors that significantly affect criminal homicide arrest rate patterns in the United States for elderly criminals of the ages 65 years and older, from 1964 to 1985. The analysis reveais that changes in commonly selected economic, demographic, law enforcement, and punishment variables are significantly correlated with elderly criminal homicide arrest rates in a manner consistent with implications from general theoretical models of criminal behavior and with frameworks specifically dealing with criminal homicide.     

Accomplishing Difference: How Do Anti-race/Ethnicity Bias Homicides Compare to Average Homicides in the United States?

Research on the nature of bias homicide has experienced increased interest in the academic literature. To date, few studies have compared the similarities and differences between anti-race/ethnicity bias homicides and average American homicides. Consequently, we know little about how the offender, victim, and situational characteristics compare across these two homicide types. Drawing from doing difference theory of bias crime, the aim of this study is to comparatively analyze the attributes of anti-race/ethnicity homicides to average homicides between 1990 and 2014. Anti-race/ethnicity homicide data is extracted from the U.S. Extremist Crime Database and paired with average homicides from the Federal Bureau of Investigation’s 2000 Supplementary Homicide Reports. The results of this study suggest that the characteristics of anti-race/ethnicity homicides are both similar and different from average homicides. Implications for bias crime theory, research, and policy are discussed.     

常州市武进区5年94例已破命案的回顾性研究

目的本课题收集真实案例进行回顾性研究、比对,寻找常州市武进区命案特征,总结命案现场的法医学检案重点、难点和相关实践经验。方法收集江苏省常州市武进区2006～2010年94例已破命案资料,应用Microsoft Excel软件进行一般描述性统计分析。结果 2009年、2010年案件数量略有上升,而每年的第一、三季度为命案高发季度。受害人及嫌疑人多为流动人口,男性显著多于女性,以青壮年为主。嫌疑人均学历较低,多从事打工、务农,或无业,多由纠纷升级为命案。以锐器伤及钝器伤多见,死因基本为机械性损伤和机械性窒息。结论命案发生与人口数量呈正相关。受害人及犯罪嫌疑人基本情况、作案动机、致伤工具、损伤分布、死因等均反映出了命案现场法医工作的基本内容、工作重要性及未来的研究发展方向。     

Extent, trends, and perpetrators of prostitution-related homicide in the United States

Prostitute women have the highest homicide victimization rate of any set of women ever studied. We analyzed nine diverse homicide data sets to examine the extent, trends, and perpetrators of prostitution-related homicide in the United States. Most data sources substantially under-ascertained prostitute homicides. As estimated from a conservative capture-recapture analysis, 2.7% of female homicide victims in the United States between 1982 and 2000 were prostitutes. Frequencies of recorded prostitute and client homicides increased substantially in the late 1980s and early 1990s; nearly all of the few observed pimp homicides occurred before the late 1980s. These trends may be linked to the rise of crack cocaine use. Prostitutes were killed primarily by clients, clients were killed mainly by prostitutes, and pimps were killed predominantly by pimps. Another conservative estimate suggests that serial killers accounted for 35% of prostitute homicides. Proactive surveillance of, and evidence collection from, clients and prostitutes might enhance the investigation of prostitution-related homicide.     

Gender inequality and homicide: a cross-national examination

Studies examining gender inequality and crime have often explored the connection between female victimisation and crime. However, feminist theories do provide a rationale for gender inequality affecting all crime, not just female victimisation. Using the ameliorative and the backlash hypothesis the current analysis examined gender inequality and homicide in 94 countries. Using a gender inequality index, we found that as gender inequality increased the homicide rate increased. This finding supports the ameliorative hypothesis, which states that as societies become more equal crime will decrease.     

Identification of mechanical asphyxiation in cases of attempted masking of the homicide

Five homicides are described that had remained unexplained as to the causes of death after gross pathology. Although general signs of asphyxiation were present, they were lacking injuries specific of strangulation or oro-nasal occlusion. The diagnoses of asphyxiation were established by microscopical investigation of the lung and confirmed by subsequent police inquiries. An oro-nasal occlusion was involved in three cases, a strangulation or an oro-nasal occlusion, in another case. The victims were young and healthy. Toxicological investigations remained negative in four cases; one victim was anaesthetized by bromazepam and ether and had a blood alcohol concentration of 80 mg/100 ml. Lung histology and electron microscopy revealed acute emphysema, the development of a haemorrhagic-dysoric syndrome and a microembolism syndrome. With regard to the haemorrhagic-dysoric syndrome, the development of alveolar-interstitial edema is particularly important. This finding may also be diagnosed by light microscopy in semi-thin sections. It is emphasized that the combined action of several pathomechanisms is responsible for the rapid manifestation of the pulmonary lesions. Especially, the haemorrhagic-dysoric syndrome is brought about by the combined action of inspiratory intrapulmonary vacuum and raised intracapillary pressure. The complex pattern allows to compile the diagnosis of mechanical asphyxia even if there is no corresponding injury.     

38例精神分裂症患者凶杀行为研究

目的　探讨精神分裂症患者的凶杀犯罪行为各个方面的特点。　方法　对 38例具有凶杀行为的精神分裂症患者 ,在心理学、生理学、社会学等各方面进行实例分析。　结果　这些患者在犯罪动机、行为特点、犯罪工具、被害人等诸多方面与正常人的凶杀犯罪有明显的差异。　结论　应加强对精神分裂症患者的诊治 ,普及精神卫生的知识 ,从而预防、控制犯罪。     

Cross-national comparison of homicide: Age/sex-adjusted rates using the 1980 U.S. homicide experience as a standard

Cross-sectional studies of crime have typically relied on crude crime rates when making comparisons between countries. Crude rates control for population size but implicitly assume that all members of the population are equally at risk. Empirical studies have shown that, cross-nationally, risk varies by age and sex. Standardization of crime rates removes the confounding effects of variable age and sex population distributions. Since age/sex-specific crime rates are generally unavailable for many countries, the method of indirect standardization is the most desirable technique. Age/sex-adjusted homicide rates for 76 countries are presented, and two comparative measures are suggested. It is shown that while the United States has a higher homicide rate than all but 15 countries; in most cases, the magnitude of the difference, not controlling for age/sex differences, is overestimated. Crude rates underestimate differences between the United States and countries with higher rates of homicide.