Before Australia was used as a penal colony, the British off-loaded criminal elements into the Carolinas. The tale is told in Albion’s Seed, without reading which you cannot understand the United States. These two charmers were arrested in Louisiana for abandoning their 5 year old daughter. I think they were doing her a favour.
Do not doubt why Americans own guns. People like this live within a few miles of the rich, and they have cars. And guns. And would kill for some oxycodone, fentanil, or just because they felt like it.