I will tell you frankly that I believe the doubts that you raise here are so unlikely that I don't feel any of them would play well with a jury, as unpredictable as juries may be. Why would you think that Christina's family would not recognize her walk in the video on the walk to the garage? I often find it quite easy to identify mere acquaintances by their walk, so I imagine that her family would have no trouble. If you want to have fun sometimes, sit on a bench in a mall somewhere and watch people stroll by. It is amazing how people vary in the way that they walk. It is interesting what ungainly creatures people are compared to deer, horses, and cats. It seems to me that you are suspicious of everything the police have offered. Is that so?
An attractive young woman like Christina does not usually have to go to the extremes of disappearing in order to ditch a boyfriend, especially one who may have already been in the process of dumping her. New boyfriends are not hard to come by, although faithful ones may be. To me, you keeping reaching for the unlikely. In order to have these suspicions, wouldn't you have to believe that Plano LE was engaged in some sort of conspiracy to protect everyone but EA? Who would they be protecting? Do you believe them to be dirty? Drug involvement creates all sorts of risks. Do you believe LE is engaged in some way with protecting drug dealers/suppliers?