Magnum Force

Eastwood plays cop Harry Callahan, who is baffled by a series of killings of prominent Bay Area criminals. He notes that all of the deaths were caused by the same weapon, a .357 Magnum. This is the gun that's widely used by members of the S.F.P.D. and the implication is that a cop is doing the killings. Eastwood wants to personally investigate the deaths, but his boss, Holbrook, calls him off the case. At a training center, there's a shooting match, and Eastwood allows a young rookie cop, Soul, to win. He'd seen Soul and three others, Urich, Niven, and Matheson, practicing at the range in an earlier scene and he has become suspicious of them. Later, Holbrook asks Eastwood to take a ride with him and, once underway, Holbrook pulls a gun on Eastwood, telling him that he is also part of the effort to keep the city clean. Eastwood slams on the brakes, and Holbrook's head is smashed on the dashboard. He pushes the boss out of the car, and discovers that he's been trailed by the rookie cops.