Comparison of the M-Vac® Wet-Vacuum-Based Collection Method to a Wet-Swabbing Method for DNA Recovery on Diluted Bloodstained Substrates*†‡

A wet-vacuum-based collection method with the M-Vac^® was compared to a wet-swabbing collection method by examining the recovery of diluted blood on 22 substrates of varying porosity. The wet-vacuum method yielded more total nuclear DNA than wet-swabbing on 18 porous substrates, recovering on average 12 times more DNA. However, both methods yielded comparable amounts of total DNA on two porous and two nonporous substrates. In no instance did wet-swabbing significantly recover more DNA. The wet-vacuum method also successfully collected additional DNA on previously swabbed substrates. Mitochondrial DNA yields were assessed, and outcomes were generally similar to the nuclear DNA outcomes described above. Results demonstrate that wet-vacuuming may serve as an alternative collection method to swabbing on difficult porous substrates and could potentially recover additional DNA on previously swabbed substrates. However, swabbing remains the preferred collection method on substrates with visible stains and/or nonporous surfaces for reasons of convenience, simplicity, and lower cost relative to the wet-vacuum method.     

Book reviews

The Afterlife of Property: Domestic Security and the Victorian Novel, by Jeff Nunokawa. Princeton, New Jersey: Princeton University Press, 1994.

Review of Scenes of Seduction: Prostitution, Hysteria and Reading Difference in Nineteenth‐Century France, by Jann Matlock (New York: Columbia University Press, 1994)     

Language use in ancestry research and estimation

Recent discussions have revolved around the concept of ancestry and ancestry estimation; however, the associated terminology and its theoretical underpinnings have not been similarly examined. This research evaluates the concepts (e.g., race, ancestry, ethnicity) currently in use, examines if they are consistent with the groups employed to illustrate them (e.g., Black, European, Hispanic), and looks for patterns in language usage. Articles in the Anthropology, Odontology, and General sections of the Journal of Forensic Sciences between 2009 and 2019 were evaluated for ancestry‐related language use. For each article, the concepts, examples, and bibliographic information were recorded, and the relationship between concept and example was examined. These data were cross‐tabulated to evaluate relationships between the variables. Cramer's V was used to assess the strength of association of these relationships. In this sample, ancestry predominates, especially recently The concept used is significantly associated with all variables except publication date and authors’ institution(s). Despite the prevalence of the ancestry concept, racially based terms for individual groups were common. The use of ancestry, over race, in forensic contexts has been suggested to be a primarily linguistic change; these results may support that assertion. Inconsistent language usage leads to a lack of clarity in meaning among researchers and misinterpretation of the data. It is critical to recognize that inconsistencies exist, but also to understand why they exist. These results underscore the long overdue need for the inclusion of diverse perspectives in forensic anthropology, especially in the current conversations surrounding ancestry and ancestry estimation.     

Belief and Death: Capital Punishment and the Competence-for-Execution Requirement

A curious and comparatively neglected element of death penalty jurisprudence in America is my target in this paper. That element concerns the circumstances under which severely mentally disabled persons, incarcerated on death row, may have their sentences carried out. Those circumstances are expressed in a part of the law which turns out to be indefensible. This legal doctrine—competence-for-execution (CFE)—holds that a condemned, death-row inmate may not be killed if, at the time of his scheduled execution, he lacks an awareness of his impending death or the reasons for it. I argue that the law of CFE should be abandoned, along with the notion that it is permissible to kill the deeply disturbed just so long as they meet some narrow test of readiness to die. By adopting CFE, the courts have been forced to give independent conceptual and moral significance to a standard for competence that simply cannot bear the weight placed upon it. To be executable, CFE requires that a condemned prisoner meet a standard demonstrating an awareness of certain facts about his death. Yet this standard both leads to confusing and counter-intuitive results and is unsupported either by the reasons advanced by the courts on its behalf or by any of the standard theoretical justifications of criminal punishment. If executing the profoundly psychotic or delusional is wrong the law needs a better account of the wrong done when prisoners like Ford are killed. I suggest wherein that wrong might be located.     

The retention of state governors

In this paper, we have provided some support for several hypotheses about the determinants of which governors get reelected. The benefit from being a member of a particular party varies from state to state and from year to year. Personal characteristics such as age are also important. The logits give some support to the importance of coalition formation; reelection is easier in states with low voter turnout and in farm states. The paper is most concerned with the connection between the economic performance and the electoral success of incumbent candidates for governor, and we find support for a model of electoral acountability, in which governors are powerful in state governments and state governments have the ability to differentially tax fixed factors relative to neighboring states.This paper raises some important issues regarding the measurement of variables in political economy, which have wide applicability to other studies in the economics of politics. Peltzman (1988) finds that the difference between the growth rate in state personal income and the national growth rate over a one to four year period prior to the election does not affect gubernatorial electoral outcomes. Concurrently, we find that the current year's growth rate in state personal income and its difference from the national growth rate are not significantly related to electoral success but that the average deviation from predicted state personal income during the governor's tenure in office is significantly related to the odds of getting reelected. That is, the data reject simplistic views of voter behavior and support a sophisticated model of voter behavior. Similarly, Peltzman (1988) has greater success using more sophisticated, cumulative measures of national economic performance.