George Zimmerman is reportedly in custody following a dispute involving his wife.
Police in Lake Mary, Florida, said that Zimmerman is being held at a residence of a relative on suspicion of domestic battery of his estranged wife.
There is a gun at the home and police are investigating whether it was used.
It's unclear what caused the fight between George and Shellie Zimmerman.
He hasn't been arrested. Rather, "as of right now, he has been placed in investigative detention," Lake Mary, Fla., police spokesman Zach Hudson said.
Hudson said there were three parties involved in the domestic altercation.
The incident comes two months after Zimmerman, a volunteer neighborhood watch captain, was found not guilty of murder in the shooting death of Trayvon Martin.
Just last week, Shellie Zimmerman filed for divorce from George.
Story developing ...
UPDATE: According to TMZ, Shellie called 911 and said her father and George got into a big argument and that George had his hand on a gun.
UPDATE: ABC News reports, quoting her lawyer, that Zimmerman pulled a knife on her today after she discovered a firearm in the house they shared.
He then pulled a gun on his wife and her dad after a verbal altercation, Kelly Sims claims. George Zimmerman's attorney, Mark O'Mara, has yet to comment.
UPDATE: George used a gun to threaten his wife and her father, according to the 911 call she made, and she was terrified he was going to shoot them.
Shellie Zimmerman placed the call, claiming George punched her father in the nose and was making threats with his hand on his gun. She says.
"He's just threatening all of us with his firearm ... he's gonna shoot us!"
Listen to the Shellie-George Zimmerman 911 call above.