28 CFR 551.152: Procedures.

(a) A victim and/or witness of a serious crime who wants to be notified of a specific inmate's release must make this request to the United States Attorney in the district where the prosecution occurred. Requests for notification received by the Bureau of Prisons directly from a victim and/or witness will be referred to the U.S. Attorney in the district of prosecution for approval.

(b) Institution staff shall promptly notify the victim and/or witness when his or her request for notification has been received. Staff shall advise each approved victim and/or witness of that person's responsibility for notifying the Bureau of Prisons of any address and/or telephone number changes.