We have seen women get physically threatened or assaulted (chair throw, headbutting, and mallet toss) with production refusing to properly remedy the situation in the name of "content," allowing the violence to escalate. Then they allowed a self proclaimed rapist to stay in a room with a sexual abuse victim. Now, we have blatant animal abuse and sexual assault by a member of production. No matter how people feel about it, legally speaking a drunk person can not consent. On top of that, people have less leeway for people in legitimate positions of power like Frank in this situation. He and fellow staff determine punishments and prizes.
This is liability central. If Sam has any legal counsel at all, they need to batter down the door to the basement now. Whoever is making the decision to let this continue needs to be gone.