Reference ballistic imaging database performance

Ballistic imaging databases allow law enforcement to link recovered cartridge cases to other crime scenes and to firearms. The success of these databases has led many to propose that all firearms in circulation be entered into a reference ballistic image database (RBID). To assess the performance of an RBID, we fired 4200 cartridge cases from 600 9 mm Para Sig Sauer model P226 series pistols. Each pistol fired two Remington cartridges, one of which was imaged in the RBID, and five additional cartridges, consisting of Federal, Speer, Winchester, Wolf, and CCI brands. Randomly selected samples from the second series of Remington cartridge cases and from the five additional brands were then correlated against the RBID. Of the 32 cartridges of the same make correlated against the RBID, 72% ranked in the top 10 positions. Likewise, of the 160 cartridges of the five different brands correlated against the database, 21% ranked in the top 10 positions. Generally, the ranking position increased as the size of the RBID increased. We obtained similar results when we expanded the RBID to include firearms with the same class characteristics for breech face marks, firing pin impressions, and extractor marks. The results of our six queries against the RBID indicate that a reference ballistics image database of new guns is currently fraught with too many difficulties to be an effective and efficient law enforcement tool.     

Behavior Problems in Sexually Abused Children of Depressed Versus Nondepressed Mothers

Children's psychological adjustment following stressors, such as sexual abuse, is impacted by environmental variables. One such factor is parental support, which can be hampered when a caregiver suffers from psychopathology. The purpose of this study was to determine whether maternal depression would impact the children's adjustment to sexual abuse. It was hypothesized that depressed mothers would report more behavior difficulties for their sexually abused children than nondepressed mothers. Participants were 58 children (and their mothers) who were referred for trauma symptoms related to sexual abuse. Mothers completed the Beck Depression Inventory as a measure of their depression and rated their children's behaviors on the Revised Behavior Problem Checklist. The children completed the Children's Depression Inventory and the Revised Children's Manifest Anxiety Scale. Results revealed that depressed mothers reported more conduct problems, inattention/immaturity, and psychotic behavior than nondepressed mothers. Differences were not observed for mothers' report of depressive or anxious behaviors across groups. The children of depressed mothers reported increased levels of depression, but not anxiety, when compared to children of nondepressed mothers. Although both groups of mothers reported symptoms to be clinically significant, the children did not endorse their symptoms in clinically significant ranges.