Collusion between Robinhood & Citadel? (new evidence)

On January 28, 2021, Robinhood shut down trading for Gamestop, AMC, and a collection of other 'meme stocks'. Did Citadel and Robinhood collaborate to minimize the damage of the epic short squeeze that was in progress?

New court documents have been released that leave clues
https://storage.courtlistener.com/recap/gov.uscourts.flsd.590042/gov.uscourts.flsd.590042.409.0_1.pdf