"We did not seek to determine whether forfeiture activities ultimately reduce crime or affect drug-related arrest patterns. However, we found some evidence that police agencies engage in forfeiture practices that maximize their potential for revenue generation. Specifically, we found that significantly fewer equitable-sharing payments are collected in generous forfeiture states, which is consistent with the policing-for-profit allegation put forth by forfeiture's critics (e.g., Blumenson and Nilsen, 1998)."

Source

Worrall, John L. and Kovandzic, Tomislav V., "Is Policing For Profit? Answers from Asset Forfeiture," Criminology and Public Policy (Columbus, OH: American Society of Criminology, 2008), Vol. 7, No. 2, p. 237.
Abstract: http://www.ncjrs.gov/App/publ…