It would be a nice to have all the theories placed in chronological timelines with all the known evidence.
for instance, the trailer was searched multiple times and that super obvious key under a pair of shoes went unnoticed? Why isn't her DNA on the key and only Avery's? could the police have found the key in a previous search, cleaned it (because someone may have contaminated it), and put avery DNA on it then placed it back into the trailer? could avery have cleaned it with bleach, which would probably have change the color of the lanyard it was attached to, because of possible blood, then taint the clean keys?
There's just a ton of missing information and misinformation. lots of WTF moments too.
i also think the doc would have been better if they remained unbiased and didn't leave out anything. ya know, go after the truth and not a verdict, eh. somting like dat, ya.