I don't care how large the group committing the acts are if there is, in fact, a large conspiracy of people actively protecting them. One person actively committing the crime is one too many, and anyone protecting them is complicit. If this were a bank robbery where someone was killed, the getaway driver still gets the murder conviction, even if he never went in the building.

To bastardize an old saying, if there are 10 people at a table and they choose to let the cannibalistic pedophile sit down and don't immediately eject them with a brick, you have a group of 11 people conspiring to protect a cannibalistic pedophile.