Silent rage [1982, USA, action, thriller, DVD5 (custom)]

Dan Stevens, sheriff of a small Texas town, checks out a disturbance which turns to murder. The killer is still in the house and tries to kill Dan, who thwarts and arrests him. The killer attempts to flee, but is shot and killed and is taken to a medical institute. Three doctors, led by Dr. Philip Spires, operate on the killer, and using a formula the doctors made, they bring him back to life. If that's not bad enough, the formula also made the killer indestructible. Dr. Tom Halman tries to stop the killer, but he and his wife are killed. After the two remaining doctors are killed, the killer goes after Dr. Halman's sister Alison, and it's up to Sheriff Dan Stevens to stop him.