I'm not saying cops aren't stupid but if I were an american citizen I would hugely object to having someone so clearly lacking in intelligence and good judgement policing the population.
I am sure that if DA did enter the Academy, none other than True Adonis would contact that PD with the youtube threats, the PMs, the emails, posts, etc etc.
Plus, many of the PDs use polygraphs, interview neighbors, and scan that background pretty well. I doubt he'd get thru checks.
Of course, the biggest pwning of all would be to LET him get thru all that, then pass on the info once he has a whole squd of cops he'll be working with for 20 years, and let him be the laughing stock of the dept.
IMO, he doesn't have the mental capacity to be a copy, anyway. Dude looks inbred, he speaks like he's reading from a teleprompter, and his insecurity will inevitably get him in a gunfight on the job rather quickly. And if his trigger is as slow as his wit, he'll be a nice backstop for streetwise bullets with no hesitation.