George Zimmerman walked out of a Florida jail shortly after midnight early Monday morning, free after posting a $150,000 bond.

Zimmerman was fitted with an electronic monitoring device before leaving the John E. Polk Correctional Facility, the Seminole County Sheriff's Office said.

Clutching a brown paper bag, Zimmerman got into the back of a white BMW and was driven away to an undisclosed location, where he will await the second-degree murder trial in the shooting death of Trayvon Martin.

Zimmerman's release comes less than three days after a dramatic two-hour hearing in which he took the stand and apologized for the shooting.

"I wanted to say I am sorry for the loss of your son," Zimmerman told Martin's parents on Friday in his first public statement about the death. "I did not know how old he was. I thought he was a little bit younger than I am. I did not know if he was armed or not."

Prosecutors had argued that the former neighborhood watchman should not be freed or that the bail should be set at $1 million.

Zimmerman attorney Mark O'Mara argued that his client's location needs to remain a secret due to threats against him.

Other conditions of his release include no contact with Martin's family and no possessing a firearm.