Murmur (DC)

Murmur was a villain from the Flash comics and media.

Origin
Murmur was originally a surgeon who went insane. He went on a killing spree, believing it would stop the voices in his head. Later, he was sentenced to death by lethal injection; a procedure that failed due to his abnormal bloodstream. Whilst in jail, he cut out his own tongue and sewed his mouth shut in order to stop himself from confessing to any crimes.

Goals and Ambitions
Murmur's only goal is to torture and kill helpless victims.