Professor Gates, Harvard's Pride

[xoxoxoBruce]

Originally Posted by Happy Monkey

Read a bit further down. That exchange had already happened when he called for the wagon. The Harvard cops were there (to lock the door) when Gates was carted away, so Crowley knew Gates was legit at that point at the latest.

Officer 2: (inaudible) to patrol. Do we have a wagon coming through to the location?

Male patrol 3: Patrol to wagon.

Wagon: Wagon.

Male patrol 3: 17 Ware Street.

Wagon: Copy.

No, there's no mention of the Harvard police being there, or that they were to lock the door. The above quote follows the last section I quoted in the transcript you linked. Crowley is officer 52, not officer 2, or male patrol 3.
There is no indication that Gates was under arrest when officer 2 asked if the wagon was still coming.