While I didn't go to some fancy lawyerin school like some of you folks. It would seem to me that his argument of "if he had done it he would have left no one else alive, so clearly he didn't do it", would leave a lot of open holes.
I don't know that the guy was out of his mind, he just sounded like he didn't know what the fuck he was doing and had no business trying a capital murder case.
One thing I will say in regards to the GPS thing you mentioned was that the case was in 2005, he probably didn't know that cellphones had GPS tracking capabilities.
The trial didn't end until 2009, although it commenced in 2005. Nonetheless, even if you give him a pass on the GPS bit, you still don't tell a jury that whoever did this needs to be executed. Because if your client gets convicted, you've fucked him.
I can somewhat see the logic in stating that your client would have killed every witness, but does that really outweigh the negative picture you're painting of your client? He's on trial for shooting and killing two women...I don't think it's sound to matter-of-factly announce that your client be sprayin' lead in the skreetz.
And then the Thomas Jefferson outfit? Nucking futs. No question.