thanks, @HumboldtOz ! if you watch how gray lays it out, you will have no doubts something very nefarious has been happening in chicago for many years. he has a list of 50+ women (ALL prostitutes, ALL strangulation) that he places on the map by where/how they were found. i believe there were up to 30 found in alleys, with the rest being found in abandoned buildings or trash dispensers. once you see it presented that way, it's undeniable.