No, they were already dead.
3 seconds sound clip from the House of Wax (1953) movie soundboard.
You can hear this line at 01:19:42 in the Blu-ray version of the movie.
Quote context
[...]
- Patterson was killed because he looked like Booth.
- No, not I. Jarrod, at the waxworks.
- His hands were no good. He had to take subjects from life.
- He was the one who set fire to the old museum.
- Jarrod came out of it alive, but insane.
- Joan of Arc. Joan of Arc! That's Cathy.
- She's there with all the rest of them. The whole place is a morgue.
[...]