Human cannibalism: a case report

Human cannibal cases are relatively rare in modern civilized societies. We report a single case of familial cannibalism that occurred in Oklahoma in 1977. The investigation posed unique problems in pathology, psychiatry, criminalistics, and serology.     

Sensitivity enhancement of ninhydrin-treated latent fingerprints by enzymes and metal salts

Lyophilized Sigma Type III trypsin has been applied to latent prints two weeks to two months old. This trypsin preparation eliminates the background problems that had been encountered with old prints in a previous study. Zinc chloride treatment of latent prints previously exposed to ninhydrin enhances their detectability upon laser examination. However, it has been reported that the zinc chloride reaction occasionally fails to occur. Accordingly, we have investigated the optimization of this reaction. We find that high humidity and elevated temperature, particularly the former, are needed. Cadmium nitrate, although it produces weaker fluorescence than zinc chloride, may at times be useful. Reaction conditions are much the same as those for zinc chloride.     

The Distribution of Household Property Crimes

Previous studies have established that repeat victimizations occur more frequently than would be expected if households within a particular area were victimized randomly. This implies that characteristics of the household affect the victimization rate. Even controlling for these characteristics, we find that a Poisson model does not capture the distribution of victimizations because repeat victimizations are more concentrated than it would indicate. This leads us to adopt the negative binomial generalization of the Poisson model. Our analysis uses sociodemographic attributes of the household and community-level characteristics to predict victimizations, with the victimization data being the observed number of property crime victimizations from the 1992 British Crime Survey. The negative binomial generalization is found to be highly statistically significant and the crime concentration it implies becomes much more marked as the predicted number of victimizations increases.     

Detection of bullet residue in bone using proton-induced X-ray emission (PIXE) analysis

External beam proton-induced X-ray emission (PIXE) analysis has been used to verify the presence of lead in the finger bone of a murder victim. The deceased, who had been buried several years, was known to have suffered a bullet wound to his right hand several years before death. X-ray radiographs of the right second proximal phalanx revealed the possible presence of metal fragments below the surface of the bone. To verify the presence of lead in a nondestructive manner, the bone was scanned with a 1.5-MeV proton beam. PIXE analysis showed that lead was present only in the vicinity of the fragments previously detected in the radiographs. A study of gunshot residue in bone shows that the distribution of lead around the bullet hole is independent of the firing distance for distances greater than 0.6 m.     

The Effects of Juror Anonymity on Jury Verdicts

This study examined the effects of anonymity on jurors' verdicts and on jurors' feelings of accountability for their jury's verdicts. Twenty four-person anonymous juries and 20 four-person nonanonymous juries rendered individual and group verdicts for three student defendants charged with selling drugs on a school campus. When unanimous guilty verdicts were reached, juries imposed one of five punishments. Finally, jurors completed postdeliberation opinion and accountability questionnaires. As predicted, anonymous juries showed a higher rate of conviction (70%) than did nonanonymous juries (40%) when the evidence against the defendant was strong, supporting the hypothesis that anonymity would have a greater effect for situations in which there was relatively strong evidence of the defendant's guilt. Anonymous juries imposed the harshest punishment (expulsion) significantly more often than did nonanonymous juries. Contrary to predictions from differential self-awareness theory, anonymous juries did not report feeling less accountable than did nonanonymous juries. However, anonymous juries did see the process as significantly more fair than did identifiable juries.     

Measuring the thickness of facial soft tissues using nuclear magnetic resonance tomography for the purpose of identification

Nuclear spin tomography since its beginnings in the seventies has steadily gained in importance as a method of examination in medical diagnostics as it produces a picture. In the field of forensic medicine the NMR technique as used for anatomic-anthropologic issues attempting to identify skulls this is a valuable supplement to an extension of the existing methods of investigation. The results of a measurement of the thickness of soft facial tissue in a live test person is shown as compared to measures obtained by sonography.