Probation & Pretrial Facilities in MI Probation & Pretrial Facilities operating within MI. Probation & Pretrial Facilities in MI US Probation & Pretrial Services Office Ann Arbor, Washtenaw County US Probation & Pretrial Services Office Bay City, Bay County US Probation & Pretrial Services Office Detroit, Wayne County US Probation & Pretrial Services Office Grand Rapids, Kent County US Probation & Pretrial Services Office Lansing, Ingham County US Probation & Pretrial Services Office Flint, Genesee County