Shellie Zimmerman asked the dispatcher to send an ambulance to check her father out. A fire department ambulance arrived at the house, Hudson said, but nobody needed to be transported.
"The call went out as a 911 call that Mr. Zimmerman was threatening them with a firearm," Hudson said. "We're trying to see if that's true or not."
Later Monday night, Hudson said, "She basically said he made a movement that would be consistent with a movement someone would make if they had a gun." But no gun was found.
Shellie Zimmerman had asked that her husband pay for a permanent life insurance policy with her named as the beneficiary, according to a divorce petition made public last week.
In an interview with ABC's "Good Morning America" that aired last Friday, Zimmerman said her husband left her with "a bunch of pieces of broken glass" after the acquittal. She said he only stayed in their house three or four nights since the trial ended and that they even tried counseling. But she moved out Aug. 13.
"I have a selfish husband and I think George is all about George," she said.
George Zimmerman's brother Robert Zimmerman Jr., tweeted after the news got out of the dispute at the home that "we've learned from GZ case not to 'jump to conclusions,' to wait for facts, & to avoid speculation. 'News' is a business — not your friend."
Last month, Shellie Zimmerman pleaded guilty to a misdemeanor perjury charge for lying about the couple's finances during a bail hearing following her husband's arrest in Martin's shooting.
George Zimmerman said he acted in self-defense when he killed Martin and the polarizing case, which included an initial delay in charging Zimmerman, opened up national discussions on self-defense laws and race. Martin was black. Zimmerman has a white father and Hispanic mother.