CD and JP both went to an upscale, very small private catholic high school together--Holy Ghost Prep. JP went to a college in the same vein (Loyola), while the others went to community college or did not go to college. I'm assuming that JP did not have a connection to any of the others aside from CD. This is supported by the fact that he went missing before them all. I'm speculating that each of the victims bought pot from CD, and that was the common connection. It could explain why some of them went seemingly willingly to the property. I think CD most likely snapped and murdered them all separately.