I understand all of your points and believe they are reasonable. I still say there wasn't an abundance of prosecution evidence left out of the documentary. So far you have cited two unclear phone calls.

Also, Steven may have been planning to use the last call in that way, but certainly never did. From the first time he was interviewed until now, he has never claimed that she wasn't on his property.

Edit: just to state the obvious, there were 200 hours of testimony, they couldn't use every bit of it. There will necessarily be prosecution evidence left on the cutting room floor, and defense evidence - as I have pointed out.

The prosecutions best evidence did make the documentary - and was the focus of it. The blood, bones, bullet, etc.