Man Made Monster (1941)

A tragic accident occurs when a bus hits a high power line. The
incident has claimed the lives of all on board, except for one
Dan McCormick (Lon Chaney, Jr.), who survives because he is,
surprisingly, immune to the deadly electricity. McCormick does a
sideshow exhibit as Dynamo Dan, the Electric Man and is taken in
by Dr. John Lawrence (Samuel S. Hinds), who wants to study him.
However, Dr. Lawrence's colleague, mad scientist Dr. Paul Rigas
(Lionel Atwill) desires to create an army of
electrobiologically-driven zombies. He gives McCormick
progressively higher doses of electricity until his mind is
ruined and left dependent on the addicting electrical charges.
This temporarily gives McCormick the touch of death, making him
capable of killing anyone he touches by electrocution. After
accidentally killing Lawrence, Rigas ensures McCormick's
conviction to see what will happen if he is sent to the electric
chair. McCormick survives, and with a super charge in his glowing
body he kills several people, including Rigas, before running out
of electricity and dying. -Wikipedia