O.K. Stretch and Russ... I'll waffle a bit on my bet. How about this: Variants 1, 2,3,4 all are DA/SA and have decockers but don't all have a safety. If these variants, I'll stick to my bet.
Variant 5 and 6 are DAO, with a safety. If that's what he carried, he had a round chambered without the safety engaged.
Variant 7 with DAO and no control lever, or with Variant 8 and 9 which are DA/SA, safety, but no decocking... or .. or...
heck.. I give up! Wasn't there! Will never know!

My usual EDC is a H&K P7. I can't imagine an AD with that pistol, particularly if holstered.