Right so you think these guys video'd it and would only destroy said tapes on the announcement the police were investigating and not on the day it was headline news all this came out?
Seriously, what you are suggesting is so improbable.
Not really, you give people too much credit, people are inherently careless and get caught over the stupidest things. People are caught for possessing child pornography when it could be trivially encrypted. So many criminals lack forethought.