Publications on Courts & Policing

The study compared traditional crime solving to biological evidence techniques in hundreds of cases where biological evidence was available. When conventional investigative techniques were used, a suspect was identified 12 percent of the time, compared to 31 percent of the cases using DNA evidence. In eight percent of cases built on traditional evidence alone a suspect was arrested, compared to the 16 percent arrest rate in DNA cases. The average added cost for processing a single case with DNA evidence was about $1,397. Each additional arrest-an arrest that would not have occurred without DNA processing-cost $14,169.

DNA evidence isn't a typical tool for investigating property crimes like burglary, but a new Urban Institute report reveals that biological evidence can be remarkably effective in solving and prosecuting such crimes.

This report presents interim findings of the Urban Institute's evaluation of the Gang Reduction Program (GRP), a $10 million, multi-year, federal initiative to reduce gang crime in Los Angeles, California; Milwaukee, Wisconsin; North Miami Beach, Florida; and Richmond, Virginia. The evaluation found substantial variation in collaboration levels among partners in each site, but each site achieved significant implementation successes. The effects of GRP in each site were mixed, and only one site, Los Angeles, showed a significant reduction in crime levels. By late 2007, however, three sites had undertaken significant steps towards sustaining GRP beyond the federal funding period.

Despite a growing consensus among scholars that substance abuse treatment is effective in reducing recidivism, strict eligibility rules have limited the impact of current models of therapeutic jurisprudence on public safety. This research effort was aimed at providing policy makers some guidance on whether expanding this model to more drug-involved offenders is cost-beneficial. We find that roughly 1.5 million arrestees who are probably guilty (the population most likely to participate in court monitored substance abuse treatment) are currently at risk of drug dependence or abuse and that several million crimes could be averted if current eligibility limitations were suspended and all at-risk arrestees were treated.

This study assesses the death penalty's costs to Maryland taxpayers by examining a sample of the 1,136 death-eligible murder cases occurring between 1978 and 1999. We find that an average capital-eligible case in which prosecutors did not seek the death penalty will cost approximately $1.1 million over the lifetime of the case. A capital-eligible case in which prosecutors unsuccessfully sought the death penalty will cost $1.8 million and a capital-eligible case resulting in a death sentence will cost approximately $3 million. In total, we forecast that the lifetime costs to Maryland taxpayers of these capitally-prosecuted cases will be $186 million.