>>515428647
He was shot from behind and to the right. The wound on his chest/neck is an exit wound. This also explains his ring coming off, shrapnel from the shot may have broken it. This is where I think the shooter was. Additionally as shown on Google maps street view the 2 other roof tops would be obscured by trees or the structures in the park to get a good line of sight on him. I imagine the small terrace with stairwell access is where the shooter was postion. This wouldn't be a normal place for people to be from the look of it and would allow them to blend back in with the crowd after shooting.