I did some digging and the interview from August 2017 was from a "confrontation" at a beach, not a shooting. However, his dad works with the FBI.... so that should raise some major flags. He was also seen rehearsing his lines before going on CNN. Here is the link:

http://www.thegatewaypundit.com/2018/02/exposed-school-shooting-surviver-turned-activist-david-hoggs-father-fbi-appears-coached-anti-trump-lines-video/