I read about this elsewhere the other day. He offered DoD inspectors a peak twice, TWICE.
He was counseled on the inappropriateness of such a breach in protocol after the first incident. And, then DID IT AGAIN.

Air Force opens investigation into allegations a mortuary employee offered to show inspectors John Glenn’s remains https://t.co/5bLhFai0O2 pic.twitter.com/rgBkHMbCe0

— CNN (@CNN) May 26, 2017

John Glenn’s remains were disrespected at the military’s mortuary, Pentagon documents allege - Military Times