I would be LESS concerned about her going alone (this is not a likely to become hostile situation given the participants), but MORE concerned about this becoming common knowledge in the work place. Anyone been reading about the cute little blond gal and the cop buddies of hers? Probably wasn't the best of ideas to involve someone at work with less to lose than her.........she isn't the employee, you are, and its you that stands to lose here.
My wife plays at work, as anyone knows that reads posts here, BUT she plays at HER place of employment where everyone involved has as much or more to Lose should loose lips try to sink a ship. And she is VERY careful to maintain a professional manner there and absolutely NO one would believe she has the afterhours life she has (save the guys she has been involved wiht).
In this situation you are now going to have multiple guys from your place of employment that are aware of your private personal sexual desires and at least ONE of them will talk. No doubt. Guys are just stupid like that.
Just a thought, since everyone else seems concerned for her physical safety and you losing "control" by letting her go alone.
CW