Interpersonal Violence and Institutional Misconduct in the Los Angeles County Jail System: A Mixed Method Investigation.

This study involved a mixed method evaluation of interpersonal violence and institutional misconduct in the Los Angeles county jail system. Interviews with 52 correctional staff uncovered a widely shared belief that AB 109, Prop 47, and the Rosas decision had all contributed to an increase in violence and misconduct in the jail. Analysis of administrative records indicated there was a rise in the monthly rates of these adverse outcomes from 2010 to 2017. Intervention ARIMA models, however, revealed evidence of a statistically significant increase following only the passage of Prop 47. An examination of inmate characteristics across the 8-year observation period confirmed staff suspicions that jail incarcerates with more extensive criminal histories were being confined following the passage of these policies. If jails are to be responsible for confining higher risk inmates, provisions should also be made to increase the availability of evidence-based rehabilitative programming and other treatment services that can help combat the occurrence of these adverse outcomes.