Alright this is frustrating. I finished the main story awhile ago so I'm in free-roam right now. I'm trying to get the last of the apocalypse horses. I know that Pestilence spawns in Tall Trees (in fact I had many opportunities to get him before but didn't want to lose War). I read elsewhere that I should try to do a missing person side mission but so far he hasn't spawned anywhere in West Elizabeth. Does anyone have any more advice for me?