Since he failed so miserably at attempting to meticulously cleaning up the crime, I think that supports the argument that he was not thinking straight. It will be interesting to see if this legal argument succeeds.
I disagree, I think it shows that his plans to cover it up wasn't going to work out for him like he was planning so he had no other choice but to flee the country as fast as he could, get to a country where he hoped he couldn't be extradited. Which is exactly what he did. Googling extradition after murdering someone a pretty alert and cunning individual, imo
Maybe it will work and he will only get a few years for a vicious murder. Then he has his date with the US over his disgusting extortion of a victim's mother. I was speaking with a few attorney friends who I hold in high regard who both say the case against him is open and shut, they have him.