It happens frequently enough [1] [2]. Both of those are in areas where the cats aren’t supposed to exist!
> I'd say jaguars, which do neither, and occasionally come in a black variant.
Yep, the article says that the DNA matched a leopard
[1] https://m.startribune.com/cougar-spotted-in-minneapolis-kill...
[2] https://kanecountyconnects.com/article/MountainLion-KaneCoun...