My end credits dilema

I watched the movie up to very end checking for hidden clues. During end credits the screen is filled with sequences of seemingly random closed circuit TV shots. Most of which are of the mall and the shoppers going by. Those are banal but the last one. Creeping before the end comes a reminder and the camera recaptures the murder scene at the parking lot.
This ending was so inspiring that I compared that TV footage to the one when Harry receives the tape and meticulously studies it.
What I found was that they don't match. In the one that Harry watches the murdered wife comes out of the shadows and surprises the gun-man. However, in the other one she walks directly towards him. Could it be that the viewer is lead to believe that even facts are a matter of interpretation for the desolate spirit or have my eyes gone sour?