This has happened a number of times.
Some guy in NY made a Fortune before he killed someone and went to prison.
Indeed. Reported multiple time here on FR. (See my post #6)
In Mississippi we had tranny sentenced to life in prison for killing a “patient” with silicone butt injections. I’m not sure if it was that case or another one, but in at least one case the illegal doctor was using silicone caulk like you’d get at Home Depot.