Uhm i have this problem of crashing when i'm in dialogue with this npc, hes a super mutant and you could actually interact with him surprisingly. Theres this part of the dialogue where i crash whenever i try to select it, its the "how'd you get the name uncle leo". Is this an ingame bug or something?
Also hes located near the Smith casey's garage, that is if anyone hasn't found out about him yet. You could rob him and shoot him in the head too, those dialogues work lol.
ive been all through there, cleared out the mercs at the fort since they had a contract on me.killed a bahemoth,cleard out a slave camp.i've been going back and forth through that whole area trying to find him ever sice i read your post, but cant seem to find him.
hmm have you tried asking him why hes called uncle leo? lol, that dialogue part is the only thing that made me crash and timtim, maybe its a random encounter i'm not sure since nookiez here says he encountered him at Fort bannister. I guess that mutant travels alot lol.
hmm strange, i guess its a problem on my side then. Well at least it was cool to meet a friendly super mutant, too bad i blew him up with a fat man because i got so fed up with the conversation crashes lol.