This study evaluated the effects of a program for detained arrestees developed by the Sacramento Sheriff's Department. The program was set up as an early intervention program to provide domestic violence (DV) education for arrestees during their time of detention before going to court. This evaluation used an experimental design. The researchers randomly assigned 629 batterers to either the batterer treatment wing of the jail or to a no-treatment control group in another wing of the jail. Interviews were conducted with the batterers and victims shortly after the arrest that placed the batterer in the Sacramento jail (Parts 1 and 2) and again six months after the intervention or control condition was concluded (Parts 3 and 4). Official police arrest data on recidivism were also collected post-arrest (Part 5). Interviews were conducted over the phone, except for the baseline batterer interviews that were done in the jail, and for those who were not available for interviewing, over the phone. Activities of the batterer treatment program included: mandatory detention in a special DV jail wing supervised by correction officers who had received special DV training, batterer educational workshops, daily Twelve-Step Drug/Alcohol addiction support groups, and strict regulations on television watching (special nonviolent educational programs were the only available programs). Batterer education classes were held daily, and the research team checked attendance logs. The arrestees were required at least to attend the program classes and Narcotics Anonymous/Alcoholics Anonymous groups and sit quietly. For the control group, participants were assigned to the regular part of the jail and received the usual incarceration experience of persons detained in the Sacramento County Jail (including no treatment services). Official police arrest data on recidivism were analyzed for up to one year post-arrest (Part 5). Treatment implementation data (Part 6), which records the frequency of the batterer's attendance in the various treatment programs offered in the special DV jail wing, and variables used in the analysis for the project's final report (Part 7) are also available with this collection. In addition to general demographic variables such as age, race, religion, source of income, and employment situation, specific variables are gathered for specific datasets. Variables collected in Parts 1 and 2 (Batterer and Victim Baseline Data) include information regarding whether or not the batterer was in the treatment or control group, the relationship between the batterer and victim, and types of injuries the victim received. Parts 3 and 4 (Batterer and Victim Six-Month Data) contain variables related to employment and living situation, as well as any additional assistance either party received since the arrest event. Variables in Part 5 (Tracking Database) include the date, location, and length of interviews. Part 6 (Treatment and Implementation Data) contains variables related to the different programs the batterer in the experimental group may have participated in. The variables for Part 7 (Supplemental Final Report Variables) include information about the study participants such as whether all four interviews were completed and the presence of any new domestic violence charges.