Vitreous humor biochemical constituents: evaluation of between-eye differences

The present study was conducted to investigate the differences in the vitreous humor biochemical concentrations for vitreous electrolytes and calcium in the same pair of eyes at identical postmortem interval (PMI). The vitreous humor samples were collected independently in both eyes from 48 autopsies (PMI range, 4.5-84.3 hours) with documented time of death. The samples were analyzed for potassium, sodium, chloride, and calcium using a Beckman Coulter LX20 Automated Analyzer based on ion-selective electrode methodology. There were no statistically significant between-eye differences at identical postmortem interval. A significantly high correlation was observed between paired potassium concentrations of both the eyes. A highly significant linear correlation was observed between the individual eye and mean potassium concentrations of both the eyes with postmortem interval. The observed differences were not significantly correlated with postmortem interval. The results demonstrated that the between-eye differences for vitreous electrolytes and calcium are insignificant. Therefore, the utility of vitreous biochemistry, particularly potassium in postmortem interval estimation and other forensic applications, cannot be questioned solely on the basis of these differences.     

“That's How She Talks”: Animating Text Message Evidence in the Sexual Assault Trial

This ethnographic study of criminal sexual assault adjudication shows how prosecutors, defense attorneys, and witnesses animate text message evidence. In contrast to other forms of courtroom testimony, text messages function as multiauthored representations of recorded correspondence in the past. Attorneys and witnesses animate texts authored by or said to characterize persons represented at trial. By whom and how the texts are animated shapes trial processes. Through a detailed comparative case analysis of two Milwaukee, WI, sexual assault trials, this article attends to the process by which text messages are said to personify or characterize authors’ meaning and intent. This animation of electronically transmitted text speaks to credibility and variably emphasizes a witness's place within gendered and racialized cultural norms. Rather than unsettling the trope of “he said, she said,” text messages become contested evidence animated by court actors within contexts of long‐standing cultural narratives of sexual victimization and offending.