NCJ Number
123913
Journal
Journal of the Forensic Science Society Volume: 30 Issue: 1 Dated: (January/February 1990) Pages: 33-38
Date Published
1990
Length
6 pages
Annotation
Bloodstains from a variety of cases were typed for group-specific component (GC) at eight forensic science laboratories in the United Kingdom to determine their success rates for GC typing.
Abstract
The laboratories typed a total of 593 bloodstains from 178 cases. The bloodstains were extracted with 6M urea followed by isoelectric focusing in narrow pH interval ultra-thin gels, immunofixation, and silver staining. Results showed that a total of 62.7 percent of the stains were successfully typed, for a success rate similar to that in a previous study. Bloodstains that were more than 3 months old were successfully typed in 6 of the laboratories. The oldest bloodstain was 7 months old. Types of materials on which the bloodstains were found included clothing, metal blades, concrete, paint, cement, glass, and grass. None of the materials consistently gave problems with GC typing. Thus, the results indicated the effectiveness of the GC system in actual forensic science work. Tables and 6 references. (Author abstract modified)