they do not need to have been in on it…
police officers follow orders.
Gray Hughues Investigates documented in his video of almost two weeks ago (https://youtu.be/yfDpCKVN7aU) that crooks threw his backpack over the passage between AGR buildings while he was walking/jogging to his resting place…
it is perfectly possible that he deposited his backpack out of sight near or behind the air conditioner which gave him access to the roofs.
the fact is that he was swinging his backpack across the roofs on his path from that air conditioner to the low roof on AGR building 6…