The only bit that didn't quite ring true for me was the blood in the sink bit?
They didn’t make any assessments about who might have done it, but I have some theories.
There’s a few things: firstly, Steven has been saying that the blood in the car must have been taken from his bathroom right from the start, which makes him sound crazy. However, it seems like the evidence could absolutely point to that.
The blood flakes on the carpet were the main thing, especially with the absence of actual blood stains on the carpet. How did they get there, if not from a dried blood source?
Secondly, as soon as I saw the blood by the ignition, I said to my DH that it looked like it had been applied with a cotton bud. It would absolutely make sense to me that someone had collected the blood with a cotton bud or swab and applied. As for a syringe, it may not have been a syringe - an eye dropper or similar, which many people have in their bathrooms? Do they have eye wash kits on site, being a salvage yard etc?
My personal theory at this point is that someone went into the trailer to get some of his belongings or hair to plant and got lucky when they stumbled across the blood.
My suspicion is that this case is almost impossible to unravel because multiple people framed Avery without knowledge of the other.
E.g. whoever killed Halbach left the car there, and possibly also planted the blood in the car. Her ex found the car conducting an unauthorised search, called the police - Colborn went over there, called in the plates and then realised what he’s done. Her ex takes her day planner from the car at this point, and they later send someone else back to look for it.
The police believe Avery has done it, but they don’t have enough evidence so they plant some more, unaware that whoever killed her has already done some of the framing.
There are a few things I can’t get my head round. For example, when they eventually find the key after days of searching, they take a photo of it - this is a salvage yard, I bet there are car keys everywhere but they know this is “the key”, yet they don’t take a photo of the bones in the pit? Bullshit.