Special Investigative Services
Special Investigative Services (SIS) is a department within the Correctional Services Branch in Federal Bureau of Prisons institutions that investigates suspected criminal activity or other activity contrary to prison discipline. This can include both prisoner activity and employee activity. SIS often relies upon confidential informants whose identity need not be revealed to the accused in Disciplinary Hearing Officer proceedings. SIS staff sometimes assist the Federal Bureau of Investigation in solving crimes that occur in federal prisons.
- "Department of Justice Federal Bureau of Prisons, Federal Correctional Institution Sheridan, Oregon and American Federation of Government Employees, Local 3979, AFL-CIO". Federal Labor Relations Authority. 1 November 2007.
- Udell, Erin (14 June 2012). "Florence inmate guilty in assaults on prison employees". Denver Post.