Di Maio can't say for sure what angle Martin was positioned at on top of Zimmerman, just that Martin was over Zimmerman when he was shot. He doesn't believe the two were standing at the time of the shooting, based on the evidence. He agrees that Martin could have been pulling away from Zimmerman when he was shot.
[Updated at 1:51 p.m. ET]
Di Maio says he can't say if the gun was pulled out of the holster by Zimmerman, just that there was a shot to Martin's chest.
"You can't tell that by any scientific method," said Di Maio.
[Updated at 1:50 p.m. ET]
"If you pulled my heart out now, I could keep talking and talking and talking ... without a heart?" asked de la Rionda.
"That's right," said Di Maio.
"For about 15 seconds or so?" asked de la Rionda.
"Right, it's between 10 and 15 seconds, it's dependent on the oxygen supply to the head," said Di Maio.
[Updated at 1:47 p.m. ET]
The rate for Di Maio's services is the same for every case: $400 per hour. He says he has charged the defense, up until yesterday, $2,400.
"This is not exactly a complicated case, forensically," Di Maio said.
[Updated at 1:45 p.m. ET]
Di Maio says he has testified all over the world and for both the prosecution and the defense.
[Updated at 1:43 p.m. ET]
Di Maio agrees that Zimmerman had a self-interest when talking with police and re-enacting the shooting. He also agrees that Zimmerman was the only one armed that night and that he had a gun and a flashlight. De la Rionda approaches Di Maio and shows him Zimmerman's flashlight.
"I wouldn't consider it a really dangerous weapon. ... I think it might cause a bruise but it's just not heavy enough to be significant," Di Maio said.
[Updated at 1:40 p.m. ET]
Often the information with the witnesses goes more towards the manner of death, rather than the cause of death," said Di Maio. He says that jurors should evaluate what the witnesses have to say but it's not important for him in his assessment.
[Updated at 1:38 p.m. ET]
Di Maio says you don't need all the facts in every case. It depends on the case. Prosecutor de la Rionda says Di Maio focused on the defendant's statement. He agrees, saying he wanted to see if it was consistent with what he found. "The rest, I can't say," Di Maio said.
[Updated at 1:35 p.m. ET]
Prosecutor de la Rionda makes a joke that he shares something with Di Maio -- a bald head. Several people in the courtroom laugh at that.
Di Maio says he can't testify as to who threw the first punch or if there even was a first punch.
[Updated at 1:32 p.m. ET]