[ Because his parents didn't mean anything to him. Why would he give a damn about something that he has zero attachment to? ]

Never knew them, [ Hickey says, with a little shrug. He looks over at the ghosts, regarding them with a frown as he continues. ] If it was someone I knew from back home? Then yeah, maybe I'd feel off. But I've got no idea who these people are. Why should I care about complete strangers?