Mr. Caruthers

Mr. Caruthers was the true antagonist of the horror film, The Clown At Midnight - he was an insane but devious serial-killer who successfully evaded detection until near the end of the film, framing a number of other people (dressed as clowns) for his crimes while continuing his long crusade of death in an opera house where years previously he had killed his love-interest due her rejecting his advances: he then began murdering anyone he came across with the use of elaborate death-traps.