Sorry for quoting my earlier post, but there seems to be some confusion.
I am interested in anyone's or everyone's answers to the question I have bolded above from my original post.
I was asking for speculation on why LE has not released details on the family's timeline/activities except for the park. I just would think that this might generate more tips.
I wasn't really questioning why they requested the tapes.
Answer: They're sneaky little... (oops!)
Maybe they do not want friends or family to try and validate it? Maybe they are not sure the Celis told them everything - you're assuming somewhat that they know where they were then went to look for video. Perhaps they feel they don't know and want to see what pops up. Or maybe it serves some purpose that's similar for a possible perp? Alibi?
I'm now wondering... maybe the FBI or ? said they should look in some places, no trace of that in the reports, it's just an order that came from a commanding officer or someone in charge of the investigation.
Perhaps they already know from another case that there is a suspicious character who lives near that area - JQP mentioned some, but I don't remember where on the map they would be placed.
I'd love to hear they got everything on surveillance from the Wicked Wench or whatever the name of that bar is!