I for one have not concluded that simply because Tony called the police, he is not involved. I don't think he has to talk to the press at this stage, but until I know more about him I'm not writing him out as possibly being involved. It just seems really weird to me that you are seriously dating a lady with a child, and you don't see that child for 1 month, and just assume she's with a nanny etc???? Why didn't he say "let's get caylee and do something today?". I mean really, 1 month, no kid, no questions???? I doubt he'd believe she was with a babysitter the whole month, and even if he did believe it, what did he think of Casey ditching her child for the month to party & sleep with him?
One, of many possibilities in my mind, is that Caylee died while they were partying, and he felt he was also responsible and would also be in trouble, so he assisted in getting rid of the body.
All above is IMO only.