100k????,.. sounds like pure b/s, brother... he'd be dead already at that price, guaranteed. id be willing to wager that this is a ploy to swindle someone out of cash or just put the fear of god into someone for personal satisfaction.
hell, im from the chicago area and know quite a few individuals that would do the same for less than 5k,.. and they sure as **** wouldnt send messages with such threats over a digital medium indicating such.
hopefully the meth-head making such threats dies in an anhydrous handling incident.