"At that point, no," Serino said, saying he wasn't concerned Zimmerman followed Martin as O'Mara notes dispatcher Sean Noffke asked twice what Martin was doing.
The state then objected to O'Mara showing Serino the picture of Zimmerman's injuries and asking about Zimmerman's "minor injuries."
O'Mara asked Serino if he felt Zimmerman was uncaring after he said he couldn't come back the next day for follow-up because he had class.
"Appeared odd he had that on his mind," Serino said.
O'Mara also asked if anything told Serino's "spidey sense" something was wrong with Zimmerman's story in the interview, to which Serino said there wasn't.
The state objected after O'Mara asked if Serino had information that Zimmerman acted in self-defense and a bench conference was held. Judge Debra S. Nelson then told the jurors they had a matter they needed to take up outside of their presence.
Nelson ruled the state's objection would be sustained.
O'Mara then questioned Serino's tactics in interviewing Zimmerman, calling it a "challenge interview" to reveal new information. O'Mara asked if Serino presented Martin positively in the interview, to which Serino said he didn't know anything to think otherwise.
Serino also said he didn't mean to make the interview a "challenge interview" and that it was "just another interview."
Serino said he thinks Zimmerman was telling the truth about what happened with Martin, but recommended manslaughter charge when his department wouldn't arrest Zimmerman.
Singleton, who got the first sworn statement from Zimmerman, his first taped statement and participated in the video reenactment the day after the Feb. 26, 2012 shooting, took the stand earlier Monday.
De la Rionda questioned Singleton about Zimmerman's appearance, injuries and if he was under the influence the night of the shooting.
The jury then heard part of Singleton's first recorded interview with Zimmerman as she read Zimmerman's Miranda rights. In the interview, Zimmerman told Singelton, "I decided to start a Neighborhood Watch program."
In the recording, Zimmerman told Singleton, "these guys always get always get away," and that he hadn't seen Martin before. Singleton asked for a contact to get surveillance video and brought back Zimmerman's phone so he could look it up for police.
"I see him circling my car and then he goes back into the darkness," Zimmerman told Singleton in the recording, saying he got out of his car because he didn't know the name of the street and wanted to know where Martin went.
Zimmerman said as he was walking back to his vehicle, he was attacked and punched in the face by Martin after he jumped out of the bushes.
"When I walked back that's when he came out of the darkness and I guess he was upset that I called the police."
Zimmerman said Martin said, "what the f***'s your problem, homey?" Zimmerman said he had no problem and then Martin punched him, making him fall backwards as Martin "wailed" on his head and Zimmerman yelled for help.
Zimmerman then told Singleton that Martin said to him," you're going to die tonight."
Zimmerman told Singleton about the confrontation and how Martin was pushing his head on the pavement.
"He's still trying to hit my head against the pavement ... tried to bang my head again, I pulled my firearm and shot him," Zimmerman said.
The state then played a portion of the interview where Singleton asks Zimmerman to show on a map where the altercation happened and where he parked.
He said Martin first looked into his vehicle but didn't circle it at the clubhouse. Zimmerman said he lost Martin so Zimmerman drove, parked and then Martin circled the vehicle.
De la Rionda had Singleton read Zimmerman's written statement aloud to the jury, in which Zimmerman repeatedly used the word "suspect" to refer to Martin. Singleton said she had never used the word "suspect" to describe Martin.
Zimmerman wrote that it "felt like my head was going to explode" and sensed Martin was going to get firearm unholstered. Zimmerman said he was "in fear for my life."