Shank

Story related, can not be missed if you finish the game.

Boss Tips:

Back off from him and get near one of the 2 sides near the fire and block his gun attacks and wait until he starts to charge at you. Once he is near you, quickly press towards him and to dash past him, then turn and combo him into the fire. Once he is on fire, quicky run to him and press to do a heavy damaged combo. Rinse & repeat until he's dead.