A highly specialized team, going to insertion, and no gunship tac trail? No C & C orbiting higher, No AWACS layered eyes? RPG's are point and shoot. Either the bird comes close to the ground because it is flying over a mountain, or it is on approach, otherwise, no can hit the hook.
I could imagine a scenario whereby they were planning on a stealth insertion, but would still have tac trail, perhaps higher in the form of a fast mover, and had their plans compromised, thus flying into a hasty ambush.
Many questions, here.
Many questions....and to date....no plausible answers.
Who...if anyone....is investigating?