The effect of time after body discovery on the accuracy of retrospective weather station ambient temperature corrections in forensic entomology

Weather station data are used by forensic entomologists to estimate ambient temperatures at body discovery sites. Correlation data from sites may also be collected to correct for site and station differences. This experiment tested the accuracy over time of retrospective weather data correction using linear regression between stations and sites. Temperatures were logged at six hypothetical body discovery sites during a seven-day period for which a hypothetical body lay in situ, and a further four correlation periods. The accuracy of weather data for hypothetical body in situ periods improved after correction in 22 of 24 correlations; however, mean predicted body in situ temperatures for sites differed significantly between correlation periods. Predicted temperatures generally rose with time after body removal, which correlated with rising site temperatures accompanying seasonal change. Therefore, practitioners should be cautious in making correlations if weather patterns during correlation differ greatly from those while the body was in situ.     

Assessment of body fluid identification and DNA profiling after exposure to tropical weather conditions

Despite current advances in body fluid identification, there are few studies evaluating the effect of environmental conditions. The present work assessed the detection of body fluids, blood, semen, and saliva, through lateral flow immunochromatographic (LFI) tests, exposed to tropical weather conditions over time, also evaluating the possibility of obtaining STR (short tandem repeat) profiles and identifying mitochondrial DNA (mtDNA) polymorphisms. Blood, semen, saliva samples, and mixtures of these fluids were deposited on polyester clothes and exposed to open-air tropical weather conditions for 1 month. The test versions from LFI (SERATEC®, Germany) Lab and crime scene (CS) used for the detection – one per each body fluid type – demonstrated that it is possible to identify body fluids and their mixtures up to 14 days after deposition. At 30 days, blood and semen were detected but not saliva. Full STR profiles were obtained from 14-day-old blood samples, and partial profiles were obtained from the remaining samples. It was possible to sequence mtDNA in the samples previously analyzed for STR profiling, and haplogroups could be assigned. In conclusion, this study demonstrated for the first time the possibility of body fluid identification and DNA profiling after exposure to tropical weather conditions for 1 month and also demonstrated the value of mtDNA analysis for compromised biological evidence.     

Chemical estimation of fresh water immersion intervals

Postmortem vitreous humor chemistry studies were reviewed in 25 cases in which death was followed by submersion in fresh water for known lengths of time. The potassium concentrations in cold temperature cases initially increased in a linear manner, but appeared to level off or decline after about 1 week. In hot weather cases, potassium levels rose rapidly during the first few days postmortem. The sodium and chloride levels decreased in a fairly regular fashion, with less temperature variation. Increasing variation in values began to occur at about 7 days. The data show that dilution of the contents of the eye by fresh water begins at about that time in cases of cold water submersion. A formula employing the weighted average of the potassium and chloride concentrations can be used to determine the duration of submersion in cold water over the range of 2-10 days.     

Commotio cordis, revisited

Nonpenetrating cardiac injuries due to direct precordial blunt impacts are a commonly encountered phenomenon in medicolegal offices. These injuries vary from contusions to valvular lacerations, or papillary muscle rupture to coronary arterial injury with resulting infarction. A less commonly occurring manifestation of nonpenetrating injury is a concussion of the heart (commotio cordis), often with dramatic physiological consequences but no morphologic cardiac injury. We describe four case reports of this entity. The cases were collected over a 5-year period (1978-1983) from the Wayne County Medical Examiner's Office in Detroit, Michigan.     

论人工影响天气致损的法律责任

人工影响天气是人类利用科技手段减少自然灾害和改善气候环境的一项现代文明成果,其实施过程中也会造成他人的人身或财产损失.人工影响天气侵权产生的责任包括行政赔偿责任、行政补偿责任和民事赔偿责任,人工影响天气过程中产生的自然灾害属于自然现象,人工影响天气实施者对由此造成的损害不必进行赔偿.     

人工影响天气权解析

人工影响天气是气候资源开发利用的重要方式,国家行使人工影响天气权力往往会和相关利益群体发生冲突。人工影响天气权是一种国家的行政管理权,在对人工影响天气诉求存在冲突的情况下,应运用利益衡量原则,平衡各方利益,并就因人工影响天气而受损的合法权益进行适当补偿。     

The Motivation Behind Serial Sexual Homicide: Is It Sex,Power, and Control,or Anger?*

Controversy exists in the literature and society regarding what motivates serial sexual killers to commit their crimes. Hypotheses range from the seeking of sexual gratification to the achievement of power and control to the expression of anger. The authors provide theoretical, empirical, evolutionary, and physiological support for the argument that serial sexual murderers above all commit their crimes in pursuit of sadistic pleasure. The seeking of power and control over victims is believed to serve the two secondary purposes of heightening sexual arousal and ensuring victim presence for the crime. Anger is not considered a key component of these offenders' motivation due to its inhibitory physiological effect on sexual functioning. On the contrary, criminal investigations into serial sexual killings consistently reveal erotically charged crimes, with sexual motivation expressed either overtly or symbolically. Although anger may be correlated with serial sexual homicide offenders, as it is with criminal offenders in general, it is not causative. The authors further believe serial sexual murderers should be considered sex offenders. A significant proportion of them appear to have paraphilic disorders within the spectrum of sexual sadism. "sexual sadism, homicidal type" is proposed as a diagnostic subtype of sexual sadism applicable to many of these offenders, and a suggested modification of DSM criteria is presented.     

Experimental and casework validation of ambient temperature corrections in forensic entomology

This paper expands on Archer (J Forensic Sci 49, 2004, 553), examining additional factors affecting ambient temperature correction of weather station data in forensic entomology. Sixteen hypothetical body discovery sites (BDSs) in Victoria and New South Wales (Australia), both in autumn and in summer, were compared to test whether the accuracy of correlation was affected by (i) length of correlation period; (ii) distance between BDS and weather station; and (iii) periodicity of ambient temperature measurements. The accuracy of correlations in data sets from real Victorian and NSW forensic entomology cases was also examined. Correlations increased weather data accuracy in all experiments, but significant differences in accuracy were found only between periodicity treatments. We found that a >5°C difference between average values of body in situ and correlation period weather station data was predictive of correlations that decreased the accuracy of ambient temperatures estimated using correlation. Practitioners should inspect their weather data sets for such differences.     

Assessing temporal and weather influences on property crime in Beijing,China

Though the relationships between environment and crime have been studied a lot in many countries, this work is still a void in China. This work presents the study about how property crimes are influenced by the temporal and weather factors in China. With the crime data collected from police, the property crimes pattern by season of year, day of week and time of day are investigated firstly. Then the influence of the temporal variables—major holidays, school close days and weekends—and weather on the crimes are tested. The findings show that the robbery is significantly influenced by the temporal variables but has no correlations with weather, while burglary is not only affected by the temporal variables but also correlated with sun light hours.     

Stay cool or get hot? An applied primer for using temperature in forensic entomological case work

The reliable reconstruction of the temperature conditions at a crime scene is still a great challenge in forensic-entomological case work. Despite many published standards and guidelines for reconstructing temperature, and studies analysing the influence of various factors on the accuracy on such reconstructions, there are astonishingly many cases in the literature in which the temperature at the place of discovery is not reconstructed at all, i.e. the most common method is using the data of the nearest meteorological weather station without any correlation with on-site data. This study summarizes the state of the art in temperature reconstruction from an entomological point of view and compares the application of generalized additive models (GAMs) and linear regression on the basis of hypothetical death scenarios with various post mortem intervals (PMI) and measurement periods for the correlation between crime scene and weather station. We show that GAMs i.e. analysing the potential delay effect of temperature within a day, are the tools of choice because they give better, i.e. more accurate estimations than linear regression in 95,6% of all analysed cases regardless of the PMI, body discovery site and correlation period. Nevertheless, each case and crime scene is unique and therefore each entomological expertise should discuss the possible strengths and weaknesses of its temperature reconstruction. Even if temperature is not or cannot be reconstructed for various reasons, a comparison of on-site data with those of a meteorological weather station is the minimum forensic experts should do.     

心理测试原理略论

原理是测试方法的理论基础和科学依据。心理测试(测谎)技术是通过测量人体生理变化参数来确定人对相关问题回答是否诚实进而判断他与所调查案件是否相关的一门技术。其基本原理是:心理刺激触发生理反应,生理反应反映心理变化;刺激强度与反应大小正相关;相同问题刺激不同反应。     

Parametric Insurance: Using Objective Measures to Address the Impacts of Natural Disasters and Climate Change

Parametric insurance is a promising alternative to traditional insurance when it comes to addressing catastrophic weather events and their impact on developing nations. Where available, traditional insurance is expensive and can involve protracted claim adjustment. Parametric insurance, on the other hand, provides coverage monies automatically upon the existence of certain objective weather-related parameters based upon a set formula. This model has been shown to work in the Caribbean Basin, but requires international cooperation in pooling, measuring, and managing risk. The immediate availability of emergency-response funds can be crucial in mitigating the impacts of climate change and related severe weather events.     

Recreational Sporting Activity Vehicle‐Related Deaths

Deaths occurring in the setting of nonprofessional, vehicle‐related, recreational sporting activities occurring on land or in water during warm or winter months represent a diverse group of cases. These deaths tend to involve scenarios where the participants are purposefully attempting to enjoy themselves prior to experiencing sudden, catastrophic accidents resulting in lethal outcomes. Ultimately, many of the deaths are related to the high speed at which these vehicle‐related activities normally occur. Three broad categories of factors may play contributory roles in death: human factors, vehicle factors, and environmental factors. A series of selected cases are presented, representing examples of varying activity types, involving motorized and nonmotorized vehicles, land and water activities, and warm weather and cold weather environments. For each case, the various human, vehicle and environmental factors believed to be contributory to the accident are considered, and strategies for prevention of these and similar deaths involving recreational sporting vehicles are presented.     

现代经济的社会性与经济法——关于经济法产生原因与性质的思考

计划经济也好 ,市场经济也好 ,都是一种社会化经济 ,都是建立在高度专业化分工基础之上的为他人而生产的经济。高度的专业化分工 ,产生了一系列的社会问题。经济法之所以有存在的必要 ,就是因为通过经济法 ,可以解决经济领域因社会化而产生的各种社会问题 ,或使之得到一定程度的控制和缓和。因此 ,无论是计划经济时代的经济法 ,还是市场经济时代的经济法 ,都是真正意义上的经济法。经济法存在的基础不在于市场失灵和政府失灵 ,而在于现代经济的社会化以及由于这种社会化而产生的经济社会的依赖性     

Interaction between carbon monoxide and ethanol in fire fatalities.

Impairment due to ethanol is clearly a risk factor in deaths due to fire. However, it is less clear whether there is a physiological interaction between ethanol and carbon monoxide (CO) that would alter the carboxyhemoglobin saturation level (COHb sat.) that accounts for death. In an attempt to explore this issue further, 196 fire fatalities investigated by the Office of the Chief Medical Examiner, State of Maryland over a 3-year period were examined. COHb sat. and blood ethanol concentrations (BAC) were tabulated. Twelve cases positive for therapeutic or abused drugs other than lidocaine or atropine were excluded; 184 cases were included. The data indicate that ethanol does not affect the COHb sat. that accounts for death, since the percentage of cases positive for ethanol at a given COHb range shows no trends. Therefore, we conclude that although ethanol remains a risk factor in fire fatalities, the risk appears to be related to the impairment that it produces as opposed to a direct interaction with CO.     

Fertility control in historical China revisited: New methods for an old debate

We revisit the debate over the deliberate control of reproduction in historical China through a reanalysis of data from the Qing (1644–1911) Imperial Lineage that accounts for physiological or other differences between couples that affected their chances of having children. Even though studies of contemporary and historical European fertility suggest that failing to control for such differences may obscure evidence of parity-specific control, previous studies of historical Chinese fertility have not accounted for them. We show that in the Lineage, failure to account for such differences leads the association between the number of children already born and the chances of having another birth to appear to be positive, but that once they are accounted for properly, the relationship is inverted. Based on this, we conclude that lineage members adjusted their reproductive behavior based on the number of children. We also show that the sex composition and survival of previous births affected reproductive behavior. We conclude by suggesting that one way forward in the ongoing debate over fertility control in historical China is through application of such methods to other datasets and comparison of results. We also suggest that progress in the debate over fertility in historical China has been impeded by confusion over the definition of fertility control, so that some behaviors are recognized as fertility control by some parties in the debate but not others.     

An Assessment of the Validity of Polygraph Examinations for the Psychophysiological Detection of Deception: A Judicicial Opinion and Research Study Review

The polygraph device has been advanced by proponents as a valid (measures what it is supposed to measure, even against counter-measures), accurate (it does what it is supposed to do), and reliable (produces consistent outcomes) diagnostic tool able to measure physiological responses indicative of deception. These physiological responses are said to be a direct result of psychological arousals. (National Research Council [NRC] of the National Academies, The polygraph and lie detection, 2003). A debate concerning the validity of this test instrument has maintained for over 85 years, since the first polygraph device was introduced. This analysis takes into account court cases that address the issue and the available literature and relevant studies that support judicial decision-making. The conclusion arrived at is that this particular testing device has not attained a level of scientific support to warrant unqualified judicial acceptance.     

Circumstances of death and diagnostic difficulties in brushfire fatalities

The deaths of 10 bushfire (brushfire) victims (aged 2-59 years; M/F 1:1) from the files of Forensic Science SA in Adelaide, South Australia, over an 8-year period (January 2002 to December 2009) are reported. Nine of the victims were found in or near motor vehicles. Death was attributed to incineration (N = 5), trauma from bushfire-related vehicle crashes (N = 2), inhalation of products of combustion with hyperthermia (N = 1), inhalation of products of combustion (N = 1), and undetermined (N = 1). Death scenes covered large areas and involved many victims. Loss of infrastructure and closure of local roads owing to debris limited access and made the finding of bodies difficult. Bodies in such fires may be exposed to the damaging effects of weather and animal predation. Heat damage hindered pathological assessment with resultant delays in identification. Assessment of antemortem injuries and determination of causes of death were also complicated by the condition of some of the bodies.     

Motor vehicle collisions and their demographics: a 5-year retrospective study of the Hamilton-Wentworth Niagara region

This retrospective study examined population demographics associated with motor vehicle collision (MVC) fatalities over a 5-year period in the Hamilton-Wentworth Niagara region. Variables were drawn from the five factors proposed by Fierro (1) for investigating deaths caused by transportation: human, chemical, environmental, vehicular, and highway. Factors analyzed included age, gender, position to the vehicle, site(s) of injury, toxicology, environmental contributors, and vehicular findings. From 1999 to 2004, there were 321 MVC fatalities that primarily involved males 20 to 29 years of age and commonly drivers or pedestrians. Cars and trucks were the most frequent vehicles. Fatalities occurred most often on local and regional roads on Fridays and Sundays between 6 pm and 6 am. Mechanical failure and weather conditions were not significant contributors. Toxicological analyses (275/321) were performed on the majority of the study population. Ethanol was present in isolation and with other substances, especially cannabis, mostly in male drivers 20-59 years of age.     

论未成年人犯罪的刑种适用

当前,未成年人犯罪已经成为国际社会普遍关注的严重社会问题,在我国的刑事案件和犯罪人数量上同样也占据相当大的比例。但由于未成年人特殊的生理和心理特征,在刑罚的适用上也必须有所特殊,应当贯彻“教育、感化、挽救”方针,严格坚持禁止死刑和从宽处罚这两项原则,充分保护未成年人的合法权益。