“”the VA was treating him with””
You got that from the article? I sure didn’t see anything that said he was getting treatment at the VA...
"the VA was likely treating him with"
However, let us see how the story plays out when all the facts are published. I'd bet on him receiving Psychoactive drugs aggravating his mental state. To my understanding, some of these chemistries suppress one's inhibitions (more speculation). I have seen that effect in a person taking Prozac.