Zimmerman, a neighborhood watch volunteer in Sanford, Fla., went into hiding with his family after he was acquitted July 13 of murder in the shooting death of Martin, an unarmed black teen. Zimmerman had pleaded self-defense.
Since the verdict, Zimmerman has not spoken out or been seen publicly -- that is, until a crash on Interstate 4 trapped a motorist in an overturned pickup.
Sanford Police Capt. Jim McAuliffe told ABC News Monday Zimmerman "pulled an individual from a truck that had rolled over" last week.
Sanford police did not say what caused the accident or if there were other witnesses. The accident took place about a mile from where Martin was shot.
Zimmerman's father, Robert, told ABC News his family has received numerous death threats since the verdict was announced.
"We have had an enormous amount of death threats. George's legal counsel has had death threats, the police chief of Sanford, many people have had death threats," Robert Zimmerman said. "'Everyone with Georgie's DNA should be killed' -- just every kind of horrible thing you can imagine."