Everyone's Missed The Point
I Can't believe that everyone's missed the point in this movie
She was dead, Liam Neeson wasn't a killer, he really could talk to the dead
He kept photo's of the corpses to remind himself of the people he'd helped, not the people he'd murdered.
The boy's mother was also obviously dead, remember when he told the boy that the first person he talked to, after they'd died, was his mother - he and the boy shared the same gift. The boy could also see the dead chick and even buried it.
The whole film was about him trying to help her accept her death