I hadn't seen anything involved in these murders that any number of people couldn't pull off.
Many American teens or reasonably short term shooters have the ability to make these shots,even if we discover in the end that it is a "pro".
In my experience over the years,true hunters,teens included,are not the types that kill for "thrill or fun".
The nuts that kill for no reason are often the wannabe hunter or military types.They're the same kinds that are thrilled by inflicting pain on animals or humans for no reason.
I still wouldn't rule out an individual or group trying to harm our Nation for whatever "cause" they support by any means and in my own mind think that's most likely at this time.
He's a decent shot, but they are not hard shots to make. Where he is clever is making sure that he's not noticeable before the shot is fired.
Stay Safe !