Damn IDK, I have a family member I actually hate and probably wouldn't be sad if he died.
He is a cousin, but it seems like he has no redeeming qualities he is racist, homophobic completely objectifies and disrespects women and he's murdered pets. He shot my dads dog, claimed it bit him, if it did its probably because he tried to be rough with it. Also there was a cat my dad was fond of that disappeared, me and him kind of worry he might have killed that cat as well. He's just not a nice person at all and I want nothing to do with that.
The best I can do is just not have contact with him. Seems maybe your family member is not quite so bad, but might be best to just try and keep a distance till he's out...or till you can move out I suppose if he stays that long.
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Tis the time to melt the Ice.