Authorities are investigating a federal agent’s shooting of a suspect near Rapid City that began with a car chase on the Pine Ridge Reservation last month. The FBI is investigating what prompted the car pursuit and the reason for the shooting. Federal prosecutors will then decide if charges are warranted. Authorities have released few details of the December 19 shooting. The suspect’s name, what he or she was wanted for, or the seriousness of the injuries all remain unanswered.