Continually stating, "It's not HER FAULT." Can get in the juror's heads even though that's obviously not Juan's intent.
I heard a little wavering in his voice those first few sentences. Then he launched into "But, It's not her fault." over and over again. I think this was a bad move.
Subliminal suggestion could take over and they begin to wonder about all that.
Also, I think he's a bit rambling,
He needs to change his pitch and tone. It's a fact that people will tend to tune you out after a while if you are in the same urgent pitch like that through out. He needs to bring it down a notch just like a fine piece of music and then build on the important parts.
I would like to see him NAIL HOME the premeditation and the lying.
She admits herself on the stand she's lying.