Could be that, or maybe he didn't lie on the 4473? Regardless, you brought up another point I've been wanting to make: The medical and psych fields are FULL of leftists, and they use all kinds of tricks to further the "anti-gun" agenda, among others. This is a common theme on MedPage Today, a supposedly legit medical website:Of course they interviewed that gun-grabbing advocate POS Chipman. Anyway...
If the OP’s friend’s 23-yr-old son popped “denied” for mental health issues, then it’s an example of databases talking to each other. Good, bad, indifferent: mental health databases are obviously making a mark on the NICS...
https://www.medpagetoday.com/psychiatry/anxietystress/98203
https://www.medpagetoday.com/opinion/second-opinions/98960
They are always pushing for kids to be brought into the system and put on drugs, thus setting the stage for getting them banned from purchasing. And if the kid ends up doing a mass shooting, all the better, in their minds. The "Generation Rx" movie that I posted earlier is a must-watch... just keep in mind that it was made 15 years ago, so it is ten times worse now.