The president opened up about the forms of racial discrimination he experienced as a young man and said: 'I could have been Trayvon Martin.'
George Zimmerman, the killer of Trayvon Martin, has said sorry to his family for the loss of their son.
George Zimmerman has been charged with second-degree murder over the fatal shooting of unarmed black teenager Trayvon Martin.
George Zimmerman has been released from custody on a $9,000 (£5,500) bond by a judge in Florida and is forbidden from possessing weapons.
Zimmerman, who was cleared of murdering black teenager Trayvon Martin earlier this year, was arrested after allegedly pointing a shotgun at his girlfriend.
He's been charged with with domestic aggravated assault with a weapon, domestic battery and criminal mischief.
George Zimmerman has been charged with "assault and battery" following a disturbance at his girlfriend's home - Associated Press (AP) reports.
AP says his girlfriend reported him for pointing a shotgun at her.
Zimmerman, who was cleared of shooting black teenager Trayvon Martin, was arrested at his home in Florida today.
George Zimmerman, the Florida man who was acquitted of murder in the shooting of unarmed black teenager Trayvon Martin, was arrested after police responded to a disturbance call, police said.
It was not immediately clear what Zimmerman was accused of, but a statement by the Seminole County Sheriff's Office said he was being transported to a county jail in Sanford, Florida.
Seminole County Sheriff spokeswoman Kim Cannaday could not be immediately reached for comment.
The estranged wife of George Zimmerman has accused him of threatening her and her father with a gun in a call to police.
Shellie Zimmerman said 29-year-old Zimmerman, who was cleared over the fatal shooting of an unarmed black teenager, punched her father on the nose, smashed her iPad and threatened both of them with a gun.
George Zimmerman is "free to go" after being detained over a domestic dispute involving his wife Shellie, NBC News reports, citing a Lake Mary Police spokesman.
Zach Hudson also said both parties have accused the other of being the aggressor and Mr Zimmerman's gun has been confiscated.
He also confirmed that everyone was checked over physically, and no one had any visible marks or required any treatment.
Mrs Zimmerman has since left the house where the incident took place with her lawyers.
US entertainment website TMZ, has published audio of the 911 call purportedly made by George Zimmerman's wife to police during a domestic dispute.
In the call, a women is heard saying: "He's just threatening all of us with his firearm ... he's gonna shoot us!"
A police spokesman has confirmed that Mrs Zimmerman called the emergency services and said that her husband threatened her father and herself with a gun.
George Zimmerman's wife Shellie does not plan to press charges against him in domestic dispute, Reuters reports, citing the police.
George Zimmerman's wife called 911 saying he threatened her and her father with a gun, a police spokesman said.
Lake Mary, Florida, police spokesman Zach Hudson said no one had been arrested and police officers were at the scene at a house belonging to Shellie Zimmerman's father.
"She is claiming, according to the 911 call, that Mr. Zimmerman was threatening her and her father with a weapon," Hudson said.
Shellie Zimmerman filed for divorce last week her lawyer said. She sought the divorce after she said last week in an interview with ABC News that the trial had strained their marriage of six years.
George Zimmerman's brother Robert has taken to Twitter to urge people not to "jump to conclusions" after he was detained by police in a domestic violence incident in Florida.
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.
George Zimmerman, the Florida man who was acquitted of murder in the shooting of unarmed teenager Trayvon Martin, was being questioned by central Florida police in connection with a possible domestic violence incident, according to a spokesman.
Lake Mary Police spokesman Zach Hudson said police, "were trying to figure out exactly what happened" in the incident and that a gun was present.