[MsLady]

I was even thinking he could just walk away. If the gun is as compact as they say it could be, a jacket could cover up the weapon. This is a crowded area, who's going to notice someone walking away from over 100 yards away?

[Sgt_Schultze]

He might be on foot. But it is certain he has evaluated his target for clear line-of-sight. It might serve law enforcement if they would investigate the crime scenes with attention to direction of fire. They could go back along the line of sight and visit the shooting scene instead of the killing scene. There may be certain similarities among the various blinds the shooter is using.