potential accomplice
The person caught on camera could have just been in the store..he is only wanted for questioning in being at the location in that timeframe. Now his picture is for the world to see..he is depicted as “involved” with the killer/terrorist.
It was also suggested by police the length of the glock would call for a more hidden mode of transportation, thus another person could have helped “drive” him there. They pictured a like gun and it didn’t appear that big to me.