Don’t ALL envelopes have UN USED STAMPS???
that is the problem, there is no post mark - the red ink stamp that marks the stamp as used. For me that means it was placed there by someone at CNN and did not go though the postal system.
Even a casual glance at the grainy images shows that something’s off. If I were Columbo, I’d be looking closely at the ‘first contact’ individuals, phone tipoffs etc. Modern urban life bristles with surveillance cameras, and electronic trails.