That's one way of looking at it, but I have to respectfully disagree with you. She had been hanging out with TonE for 5 weeks and going to fusian. That is more than enough time for bad acquaintences and relationships to form. I would say that anyone in that many photos weather she was girlfriend of a promoter or not, was deeply entrenched and involved. You made my point for me with the beer pong reference. That was how life used to be for her. Then she moved on to the club scene, all new people she didn't know that well and obviously would have been stupid to trust only five weeks later.
Also the ZG factor is not that cut and dry! So, how did she get ZG's name? How simple was that? I haven't heard any information on how the link was made between ZG and Casey. Looking for an apartment does not justify getting ZG's info at all!