Twice, eh?

This is not quite as unlikely as it sounds. The first shot was up through the chin and out the mouth, the second was temporal (at least that is the order that makes sense, it would be hard for someone with a effective temporal headshot to blow his tongue off afterward).

I worked part time for an undertaker in high school (a friend of my parents) and I once dealt with a fellow who managed to shoot himself three times. The first was up through the mouth, the second was in the leg (we think this may have been the result of dropping the gun after the first shot) and then fatally in the chest. The difference in the timeframe of the wounds led the coroner to speculate that he passed out for a time after the first (and second) shot(s). He was probably a bit surprised to come too, gathered himself, and then finished the job.

But considering the circumstances surrounding this Ukrainian, this is a little fishy.

Sounds like he needed a bigger gun.

in my criminal justice class we got a horrific scenario where a man was found shot to death with 12 shots in the head and his apartment was utterly trashed and covered with blood from a life-or-death struggle. Turns out it was a suicide. Using a 22 revolver the man shot himself. It didn't kill him but made him blind. He emptied the gun into himself and then trashed his apartment looking for more ammo to finish the job.

The above is a true case.

The security officer may be right, but I treat all deaths under suspicion first, and this one seems suspicious.