Stray Dog: Kerberos Panzer Cops(1991)

Detective Kouichi Todome, head of the elite Kerberos police squad, escapes after the unit is marked for destruction by the government. Three years later, Inui, a member of the squad, is released from prison with one goal: to find his former master. But the trail to Todome is a twisted one, and when Inui finally finds Todome, he realizes that instead of following his own path, Todome was following the orders of another.