WATCH: Ross Harris murder trial: Ex-wife, Leanna, testifying

BRUNSWICK, Ga. - The Ross Harris murder trial continues in Brunswick Monday, the defense's first full day of presenting its case.

Harris' ex-wife, Leanna Taylor, was the first witness called to the stand Monday morning and continues to testify.

Leanna Taylor, who started crying within minutes of being called to the stand, said her late son, Cooper, was amazing and she misses him so much. She told jurors Harris was a "very involved" dad, who was home every night. She said Harris had a larger than life personality and was absent minded at times.

"Ross was easily distracted," said Taylor, who said Harris would forget to cash his paycheck and was not good with time.

Taylor told jurors her marital issues with Harris started in 2008 and were sexually related, with intimacy. 

"It was very forced," she said. 

APP USERS: Watch the first part of Leanna Taylor's testimony Monday morning

Taylor went into more detail about her marriage, saying in 2008, two years after getting married, Harris told her he had a problem with pornography. Two years later, she said she found a "sexting" type message on his phone. 

"One of the more vivid fights I can remember," Taylor said. 

Taylor said she asked Harris if he wanted a divorce, but he replied, "That is the last thing I want." Taylor later told the Prosecution that if she had known that Ross was physically cheating on her, that would have been her breaking point. The Prosecution shot back by asking her why she didn't stop visiting Ross in Jail after she learned of his infidelity. 

On the day Cooper died, Taylor said she went to check him out from school, but learned he'd never been checked in for the day, and the teacher asked what she was doing there. 

"I thought she was joking," Taylor recalled. "I went into a panic and didn't know what to do." 

She said when she found out her son was dead in Harris' car, she couldn't cry, she was so confused.

Harris was seen in court with his head buried in his hand as Taylor gave her tearful account of learning her son was dead. She told the jury she had never seen Harris so "raw" and "broken" as when he was at the police department follow their son's death.

"The whole thing was like an outer body experience," said Taylor, who also said she didn't understand why her husband, at the time, was being charged. Later Taylor told the Prosecution that it took her a long time to process what had happened. 

"I asked [Harris] 'Did you say too much?'" Taylor said, telling jurors it was typical for Harris to be chatty regarding irrelevant questions to police officers.

Taylor testified her and Harris had an irrational fear of leaving their son in a hot vehicle, explaining why she said certain things to police.

"I lost my son, I lost my husband. I buried my son," said Taylor, stating the police were not nice following her son's death. Taylor described the Cobb County Police Department as being "stern" when they searched her home.

The Defense played video of Harris singing with Cooper, playing the guitar, and whistling. Taylor was emotional watching the footage. She called Harris a "hands on" father." Harris can be seen teaching Cooper to say 'bananas.' Defense played cell phone video from a family vacation to the beach where Cooper can be seen playing in the sand.

The cross examination on Leanna Taylor began in the afternoon. She tells the state, "I knew Ross better than most. But I did not know about his dark side with women."

Taylor told the state that she did not know that Ross was sleeping with prostitutes, but would not directly answer if Ross acted like a different person at home. She said, "he seemed lost."

The State will continue to cross examine Taylor Tuesday morning.

APP USERS: Watch the second part of Leanna Taylor's testimony Monday morning

The state rested its case against the Cobb County father Friday after 50 witnesses and 16 days of testimony.

The last witness was a 3D expert who created an animation of Harris' SUV with a mannequin of Cooper inside. David Dustin is a technology and software expert and constructed the scans from actual crime scene photos. The flyover presentation attempted to show just how close Cooper's car seat was to Harris' driver's seat.

The defense objected to the demonstration, saying it in no way proves what Harris saw on June 18, 2014 when he says he accidentally left his 22-month-old son in the SUV.

"Humans can't see in 360 degrees can they? You can't offer an opinion of what's in somebody's peripheral vision, can you?" Defense Attorney Carlos Rodriguez questioned.

Mr. Dustin replied "no" to both questions.

The defense began their case by talking to realtor Roger Webb who told jurors he met with Harris and his wife in February of 2014 about buying a house in East Cobb where the better school districts are. The defense had hoped to talk to Cobb County detective Shawn Murphy whose sworn statements to a magistrate judge were the bases for dozens of warrants in the case, but the judge would not allow them to ask those questions.

Thursday was dominated by the jurors’ viewing of Harris' Hyundai Tucson, where Harris' toddler son died in hot temperatures. Prosecutors shipped the SUV to Glynn County so the jury could see it.

Defense attorneys asked for a mistrial based on the viewing. The defense said the viewing meant Harris would never get a fair trial, calling it a “disaster.”

The judge denied the motion for a mistrial. After hearing both sides, the judge ruled the SUV was evidence that they jury had the right to examine. Judge Staley Clark said because it was too big to fit in the courtroom, other provisions were made for it to be on display outside.

Harris is charged with murder as well as disseminating harmful material to a minor and criminal attempt to commit sexual exploitation of a minor, offenses dealing with the sexual texts. The witness testified said she was 16 and 17 during the months she and Harris exchanged sexual banter and photos online.

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