The Witness Security Program (WITSEC) is a U.S. federal program designed to protect witnesses who testify in criminal cases, particularly those involving organized crime or significant threats. It provides new identities, relocation, and support services to ensure the safety of witnesses and their families. Participants in WITSEC often face risks due to their cooperation with law enforcement, making their protection crucial. The program is managed by the U.S. Marshals Service, which coordinates the logistics of relocation and identity changes, helping witnesses start anew while maintaining their safety from potential retaliation.