NATIONAL NEWS (CNN) — Four months after he was acquitted of murdering teenager Trayvon Martin, George Zimmerman is expected to return to court Tuesday in Florida's Seminole County -- this time after allegedly pointing a shotgun at his girlfriend.
Zimmerman, charged Monday with felony aggravated assault, is due to make his first appearance in front of a judge Tuesday at 1:30 p.m. ET in Sanford, Florida.
He was arrested Monday afternoon at the Apopka home of his girlfriend, Samantha Scheibe, after she called 911, said Dennis Lemma, chief deputy with the Seminole County Sheriff's Office.
Zimmerman, held in jail Monday without opportunity for bail, also was charged with two misdemeanors -- domestic violence battery and criminal mischief -- in connection with the incident, Lemma said.
Differing 911 calls
According to a police report about the incident, Scheibe said that after an argument, Zimmerman broke a table with a shotgun, then pointed it at her "for a minute."
Scheibe called 911 at 12:30 p.m. ET, Lemma said.
On a 911 call recording released by police, a woman can be heard telling authorities: "He's inside my house breaking all my (things) because I asked him to leave."
The woman then says to someone at the house, "I'm doing this again? You just broke my glass table. You just broke my sunglasses and you put your gun in my freaking face and told me to get the (expletive) out."
A man is heard telling her to calm down, but then she tells the dispatcher that the man just pushed her out of the house and locked the door.
In a separate 911 call, a man calls to report that his girlfriend was, "for lack of a better term, going crazy on me" and throwing his things out. The caller says the woman is outside with police.
When asked why he is calling, the man says, "I just want everyone to know the truth."
He says he never pulled a firearm and that it is in a bag, locked. He says she was the one who broke the table.
When deputies arrived at the house, Scheibe gave them a key. When they pushed open the door -- which was blocked by several small pieces of furniture -- they found Zimmerman, who was sitting and unarmed, Lemma said. He was passive and cooperative, Lemma said.
The sheriff's office was seeking a search warrant to look for two guns deputies believed were inside the home, he said. According to the police report, Zimmerman had locked up the guns before police arrived.
Scheibe 'in a safe place,' mother says
Scheibe's mother, Hope Scheibe, told CNN on Monday that "my daughter is doing good, and she's in a safe place."
Scheibe and Zimmerman have been friends for 11 years, and Zimmerman has been living with her for the past several months, her mother said.
Zimmerman's estranged wife, Shellie Zimmerman, filed for divorce on September 5. Days after the filing, Shellie Zimmerman herself called 911 and alleged that her husband had threatened her -- one of several brushes that George Zimmerman has had with law enforcement since he was acquitted in July of murder and manslaughter in the 2012 shooting death of teenager Trayvon Martin.
Recent contact with authorities
Police detained George Zimmerman on September 9 after his estranged wife told a 911 dispatcher that he had threatened her and her father at her father's house in Lake Mary, Florida.
In the call, Shellie Zimmerman said George Zimmerman punched her father in the nose, took her iPad out of her hands, and smashed it and cut it with a pocket knife.
But earlier this month, Lake Mary police said no charges would be filed, asserting there was insufficient evidence to prosecute the case. Forensic experts could not recover video from the iPad, no weapon was found on Zimmerman, and neither Shellie Zimmerman nor other witnesses ever saw a weapon, police said.
In late September, Shellie Zimmerman told NBC's Matt Lauer on the "Today" show that she had doubts about her husband's innocence in the Martin case.
Zimmerman also has been stopped for speeding twice since his July acquittal. He was pulled over the first time in Forney, Texas, in July and told the police officer he had a concealed weapon permit and a gun in his glove compartment. The officer wrote on his incident report that he gave Zimmerman a verbal warning.
Zimmerman was pulled over in early September going 60 mph in a 45-mph zone in Lake Mary and received a $256 ticket. He was not carrying a weapon at the time.
Zimmerman fatally shot Martin in the Sanford neighborhood where Zimmerman and Martin's father lived in February 2012. Zimmerman, who is Hispanic, had a confrontation with the unarmed African-American teen after calling police to report a suspicious person, and he said he shot Martin, 17, in self-defense.
Zimmerman was acquitted by a six-person jury in July on second-degree murder and manslaughter charges.
The high-profile case sparked a heated nationwide discussion of race as well as debate over Florida's "stand your ground" law.
His attorney in the murder trial, Mark O'Mara, no longer represents him.
CNN's Kim Segal, David Mattingly, John Couwels and Jason Hanna, and HLNtv.com's Graham Winch contributed to this report.