The lower case letter "e" is not open, but filled in. That trait indicates selective listening.
His lower case letter "i" is dotted directly above the "i". That trait indicates attention to detail.
Granted, it is a very short sample, and it was written in print rather than cursive, so my analysis is rather limited. But his signature reveals a lot about his emotional state. He is clearly experiencing a lot of regret, most likely not for his actions, but rather for the situation he is in. He slashed at his own name repeatedly as if trying to scratch it out. Classic sign of self-loathing.