Resistance of degraded hair shafts to contaminant DNA

We have investigated the susceptibility of degraded human hair shaft samples to contamination by exogenous sources of DNA, including blood, saliva, skin cells, and purified DNA. The results indicate that on the whole hair shafts are either largely resistant to penetration by contaminant DNA, or extremely easy to successfully decontaminate. This pertains to samples that are both morphologically and biochemically degraded. We suggest that this resistance to the incorporation of contaminant DNA relates to the hydrophobic and impermeable nature of the keratin structures forming the hair shaft. Therefore, hair samples represent an important and underestimated source of DNA in both forensic and ancient DNA studies.     

The Criminogenic,Clinical, and Social Problems of Forensic and Civil Psychiatric Patients

Forensic psychiatric patients consume an increasing proportion of mental health resources in Canada and the United States. To inform mental health policy and practice, we compared the criminogenic, clinical, and social problems of forensic patients to those of civilly committed psychiatric patients in two Canadian studies. We predicted that forensic patients would score higher on criminogenic problems and lower on clinical and social problems than civil patients in two studies: one comparing 83 forensic and 189 civil inpatients on a clinician-completed form, the Resident Assessment Instrument--Mental Health, at an urban mental health center, and the second comparing 423 forensic and 178 civil patients assessed at different times using the Patient Problem Survey. The two studies were quite similar in their findings, despite differences in their samples, measures, and data collection methods. In both studies, forensic patients were similar to or lower than civil psychiatric patients in all criminogenic, clinical, and social problems. We conclude that forensic mental health services would benefit greatly by drawing from knowledge accumulated in the general psychiatric literature. This finding also supports the idea that many forensic patients can be appropriately diverted to nonforensic mental health services.     

Canada: coroner's inquest into the methadone-related death of a prisoner

A coroner's jury made 14 recommendations at the conclusion of an inquest into the death of Sonia Faith Keepness, a 37-year-old inmate at Prince Grove Correction Centre in Prince Albert, Saskatchewan.