So I completed The Big Dig and sided with Hancock in the end and when I went to kill Bobbi she wasn't in the place where Hancock says she is. I later found her in the metro that you travel through when completing the quest. The problem is; I can't progress in the Silver Shroud quest because whenever I talk to Hancock he just repeats that I need to go and kill Bobbi but I can't as she is already dead. Anyone know what to do?