SAN FRANCISCO (AP) — San Francisco's sheriff touched off a new round of fighting Friday in the immigration enforcement blame-game that has surrounded the shooting death of a young woman walking with her father along a scenic pier. Sheriff Ross Mirkarimi ardently defended his jail's release of a Mexican national later blamed for the slaying of 32-year-old Kathryn Steinle, saying federal officials know city law requires a warrant or court order to detain an inmate for deportation. U.S.