Bty, while lining up the shot outside to watch in slo-motion as Michael comes walking out past the parked car where Lou should have been... in the scene --just-- before that, where Captain McCluskey is lying on the floor, at 1:29:56, I spotted that he blinks his eye one time. I saw this in regular motion. I couldn't see the blink as well in slo-mo.
Note, also, that Michael's first shot hits Mac in the throat, but while he's clutching his throat, you see the bullet hole from the second shot already on his forehead-- before Michael pulled the trigger the second time.
Ntra la porta tua lu sangu � sparsu, E nun me mporta si ce muoru accisu... E s'iddu muoru e vaju mparadisu Si nun ce truovo a ttia, mancu ce trasu.