I think it might be the word "named" instead of "identified." That and the two "as" appositive phrases prepositional phrases in a row.

It's only weird when you don't know anybody called "US army reservist" but it's a fairly common name around here

-US Coast Guard war criminal

yeah its very weird

"as the death toll reaches 22 people, the suspect was found out to be a US army reservist"

It's because it's an update to ongoing reporting

It's a reference to this Onion article that gets updated with a new date and location every time this happens.

The Onion didn't get theirs listed until 8 hours after OP though, which is why I'm assuming they just didn't link the article.