This document contains the 20th Annual Report on the Kings County District Attorney's Office's Drug Treatment Alternative-to-Prison (DTAP) program. The program was created in 1990 as an alternative to prison for nonviolent, drug-addicted chronic felons. The program has three primary objectives: reduce drug use, improve public safety, and save money. Highlights from the work of the program as of October 14, 2010, include the following: as of the end of the fiscal year, 2,890 defendants had been accepted into DTAP; since the program's inception, 1,250 participants had successfully completed treatment, with 55 completing treatment in FY 2010; the diversion of these program participants from prison has resulted in over $50 million in savings in terms of costs of incarceration, public assistance, and healthcare; and successful program participants have a 5-year post-treatment recidivism rate that is half the rate for comparable offenders who have served time in prison. This report has five sections detailing information on DTAP. The Introduction presents a description of the program, while the second section details the program's procedures. Program operations - screening, intake, and retention and graduation - are covered in the third section, while the program's impact on community safety, crime reduction, employment, and cost-savings are covered in the fourth section. Figures and appendix