Twisted Justice (1990)

"The Year is 2020, He's the Only One Who Can Stop the Destruction of the World!"

In the Los Angeles of the future, police are forbidden to carry weapons and must use stun guns instead. A maverick detective ignores those restrictions in his pursuit of "The Bullseye Murderer," a psychotic rapist who takes a new drug called "Umbra" that gives him superhuman strength and intelligence.