Kseniya, I respect your opinions and your right to hold such opinions, but classes mean nothing if you didn't learn any objectivity with your lessons, you cannot obsess over it, because then you'll not see any other evidence that doesn't fit your agenda.
The guy in the picture could be anywhere between 35 and 60, I see my son in his stocky appearance and the type of clothes he's wearing. (my son is 37 and lives in Georgia, so not a suspect.)
The thing is unless you were there and are involved as the perpetrator or as the police investigators, you can't know and neither can any of the rest of us, so CHILL OUT!