One part I did like was when he was explaining the hacksaw blade / window issue. It was good to hear him try to explain some of the evidence.
He was suggesting police coruption there.
Don't know why the police would have reported scratch marks on the window at the beginning. That became more important after he became a suspect. Together with finding a hacksaw blade.
The police didn't find it on the window sill, but near the window. The police would have noticed that!