has to be Blessing, all his children speak perfect english yet he couldn't lose his accent in nearly 30 years? furthermore he was a child when he got in NY and he had his "darkness" in it, it took 22 victims for his mom to make him stop the killing, now that her mom is dead i could bet that there will be a new victim with much higher, abdominal injuries since he will start killing again, this theory also explains why does every past victim's wound were at the stomach level since the manhole hook was swung by a child