George Zimmerman Update: iPad video may determine whether charges warranted in domestic dispute

(CBS/AP) LAKE MARY, Fla. - Police investigating a domestic dispute between George Zimmerman and his estranged wife say video from Shellie Zimmerman's iPad may be crucial evidence in determining whether any charges are filed.

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Lake Mary Police Department spokesman Zach Hudson said Tuesday that the iPad captured video of the dispute, but the mobile device was in pieces and needed to be examined in a lab.

CBS affiliate WKMG reports that in her 911 call, Shellie Zimmerman said: "He then accosted my father then took my iPad out of my hands. He then smashed it and cut it with a pocketknife, and there is a Lake Mary city worker across the street that I believe saw all of it."

The iPad video along with other surveillance video will be released Tuesday afternoon, police say, according to the station.

Shellie Zimmerman called 911 on Monday, saying her estranged husband was threatening her and her father with a gun. She later changed her story. According to Hudson, Shellie Zimmerman and her father now say they never saw a gun, and no gun was found. Although WKMG reports that Zimmerman's attorney, Mark O'Mara, said Zimmerman had a gun holstered to his body.

Shellie Zimmerman has reportedly decided not to press charges.

"He's in his car and he continually has his hand on his gun and he keeps saying 'step closer' and he's just threatening all of us," Shellie Zimmerman said in a 911 call, reports the station, adding that George Zimmerman was "trying to shut the garage door" on her.

"He punched my dad in the nose my dad has a mark on the nose. I saw his glasses were on the floor," Shellie Zimmerman said in the call.

Shellie Zimmerman's father, David Dean, will not face charges, Hudson said, according to the station. Lake Mary police are scheduled to hold a news conference on the matter at 5 p.m. EST.

Mark O'Mara, who served as Zimmerman's attorney in his murder trial in the death of Florida teen Trayvon Martin, said his client did nothing wrong in Monday's incident. However, on Tuesday, he said he will not represent Zimmerman in Monday's domestic dispute, the station reports. He will continue to represent Zimmerman in a lawsuit against NBC.

Shellie Zimmerman filed for divorce last week. She and her husband separated a month after he was acquitted of second-degree murder in the Feb. 2012 shooting death of 17-year-old Trayvon Martin on July 13. The case made international news after it took police several weeks to arrest Zimmerman in the case.

Shellie Zimmerman has also had trouble with the law. On Aug. 28, she pleaded guilty to misdemeanor perjury and was sentenced to one year of probation. She had been accused of lying about the couple's financial situation when she testified at George Zimmerman's bond hearing in June 2012.

Complete coverage of the George Zimmerman Trial-Trayvon Martin case on Crimesider