Yah, a poster suggested ketamine & I just jumped in b/c it's a drug that I've used a lot at work and have read up a lot about (the pharmacology of it and the dis/advantages of use for various procedures).
I will start another non-rumor. If I was a betting person I would go with oxy over ketamine as a possible other drug involved here. But really the only ones rumored so far are xanax, alcohol and cocaine.