Crew captured by David 8 before the Captain Oram Covenant Crew Arrived on Paradise? (spoilers)

I'm starting to lean towards this image being another incident other than the Captain Oram Covenant crew being attacked at night.

This article below claims the android in the background is David showing his work to the captain with brown hair.

http://io9.gizmodo.com/we-ve-seen-at-least-one-very-grim-secret-at-the-heart-o-1793188750

If this is David, with Captain Oram (with newly grown brown hair opposed to long blond hair in the cloak) then the cloak flare picture above was from another time before.

This flare image may show David attacking another crew than the Covenant while wearing the Engineer cloak.

Also, with the burnt bodies wasted away on the temple steps (below) this would explain the Engineers rotting away by the time the Covenant crew arrives.

This image with David in a cloak appears to be quite some time before the arrival of the Covenant crew due to the freshly burned Engineer corpses not rotting away.

I doubt Captain Oram would walk with David across a field of corpses and then go stand over one of David's creations (the eggs) with David's assurances of safety.

BigDave posted this photo above and pointed out the human technology (lights) already in place in the workshop. Is the flare photo above from David 8 overtaking another crew on Paradise and he recovered their tech.

This post is from Hicks/Hudson:

BigDave -  I posted a hypothesis a while ago that the Engineers had been abducting humans from Earth and bringing them there for experimentation. Maybe these skulls are left overs from a time long passed and David is studying them?