My optimistic scenario. They have said that the shooting happened where the body was found, meaning the body wasn't moved. At this location is a rental car in Hernandez name. I find it hard to believe Hernandez is stupid enough to drive somewhere in a car he rented, murder someone, and then leave the car there which would obviously make him a prime suspect. Given this I find it very hard to believe that Hernandez was at the actual scene of the crime. The only reason the car wouldn't have been removed is if the person who drove it there was unable too, i.e: dead. First of all, Hernandez doesn't need to rent a car he has plenty, and by all accounts Hernandez and Lloyd seemed to be friendly, so I think Hernandez rented this car for Lloyd to use.
Lloyd then traveled alone to the industrial park (drug deal?) and was murdered. Thus, the car he drove there in remains at the location, and the murderers get away (most likely driving the car tied to the missing side-mirror piece).
As far as the destroyed pieces, perhaps Lloyd and Hernandez fought earlier in the night, and afraid of how that would look, in an immature moment tried to destroy the evidence. Or maybe it wasn't even Hernandez? There were other individuals at the house, what is to say they didn't smash the camera and smash his cell phone, perhaps even while he was sleeping? There is too much unknown. I understand this may sound far-fetched, but let us at least give Hernandez some benefit of doubt.
(While it is a movie, and incredibly far-fetched, that Russel Crowe flick "The Next 3 Days"
(http://www.imdb.com/title/tt1458175/) is a good example of this. Everything added together makes it seem clear as day that Lara commits murder, she even has the blood on her jacket [how do you explain that], but at the end (spoiler alert) there is an explanation. Despite EVERYTHING pointing at her being guilty she in fact wasn't.)
