RE: That pic is posted for every event. — “ Well considering it mentions his name and lists the locations of where the bombs were detonated that seems unlikely.” — Quite likely:
https://mashable.com/2017/10/03/fake-photos-from-vegas-shooting/?geo=US&utm_cid=mash-prod-nav-geo#HW3z5KZW3Oqy
It was a link to a tweet not a picture of a person