The Oregon State Police, Sex Offender Registration Unit, tracks registration of persons convicted of sex crimes who reside, work or attend school within the state of Oregon. The Unit is the state repository for information within the state, encompassing adult and juvenile offenders. As of May 2007 the Unit maintained files on 13,873 individuals who are required to register in Oregon. This does not include those persons who have moved from Oregon to other states, nor does it include those individuals who are currently incarcerated in correctional facilities (i.e., state and federal prisons, youth correctional institutions, detention centers and some medical treatment facilities).