G was pretty sure the one thing he disliked above everything else was losing members of his team. It didn't matter that Archibald was technically under Morgan. At the end of the day, they were all one team and someone had now taken two of theirs.
Morgan already had the ambulance en route by the time he met G in the Ops Center. OSP would go along as the firepower in case anything went down and because it was one of theirs on scene. But, Morgan's team would take point on the investigation, which put G working with Prentiss in the field and Morgan in the center running the show.
It was a team comprised of four from each unit when they arrived on scene. G and Sean, Renko and Robert from OSP. Their job would be to contain the scene and keep everyone secure. Ross was with them as well, but G's directives to the young man were focused on taking care of his partner. Prentiss was arriving with Dom, Riggins, and Westen. All in all, it was one of the more experienced groups they could have brought. Too bad it was too little too late to save Archibald.
While Prentiss approached local PD who had arrived before they had, making introductions and handling the niceties before her team split up to deal with the actual evidence and whatever else the BAU folk liked to see beyond physical evidence, G sent Renko and Robert to stay with the body and the ambulance while he took Sean and Ross with him as he went to see to Alexis.