I guess it goes with out saying that Busch was that heavy set man. But who was the other one? The man in the police sketch looks too old to have been Gregory Greene (who might have already been incarcerated, anyway). Of all the people named, I think Arch Sloan bears the closest resemblance to the sketch, but he wasn't interested in girls, and neither was Christopher Busch (so far as we know), yet two of the victims were female.
If Busch and Sloan were both in on this, how would they have met? I haven't seen any connection mentioned.
We should make a list of government officials or business leaders who would have had enough pull to deep six the investigation into Busch back in '77/'78.
Johannes E. Spreen was the Oakland County Sheriff at that time; John F. Nichols was the Undersheriff and later became Sheriff. I don't think either of them would have had the clout—not with multiple agencies involved. It seems like it must have been someone with far more power; I'm just not sure who that would have been.
Then again, maybe someone lower down the totem pole took a bribe—some random member of the investigative team who was able to spread misinformation and make evidence and documents disappear when no one was looking. I'm not sure who that would have been, either.