Light bearing holsters are wider at the trigger guard to allow the light pass thru, this is very doable...
...and it nothing new.
Advisory for Handguns with Lights and/or Lasers Attached - The Safariland Group
A little booger hook could manage pulling it off with ease and without rotating the hood.
Bottom line, know your gear.
still the cop was not attentive and deserved what he got.