Good movie, fun watch. What i think woulda been a cooler plot would be not knowing who the killer was the whole time and then finding out that it’s cooper. The last 30 min of the movie could have even been the same just different approaches to earlier in the film in him not knowing what was going on the whole time and periodically figuring it out and maybe making it seem like he was scared of his safety and his daughter’s. Give him like a Liam Neeson esk vibe to fighting out of the concert just to find out hes the killer the same way it was done in the original script or something similar.