You don't assign him to murder cases, You just turn him loose.

Set in San Francisco in 1971, Dirty Harry is the gritty and suspenseful film that follows the story of Inspector Harry Callahan (Clint Eastwood), who earns the moniker 'Dirty Harry' for his reputation of handling the dirtiest homicidal cases. The City by the Bay faces the terror of a serial killer known as Scorpio (Andrew Robinson), who viciously snipes at innocent victims and demands ransom through notes left at the scene of the crime. Callahan is assigned to the case along with his newest partner, Inspector Chico Gonzalez (Reni Santoni) to track down Scorpio and stop him. Using humiliation along with cat and mouse type games against Callahan, Scorpio is put to the test by the cop with the very dirty attitude.