Trayvon Martin's mother says states should clarify "stand your ground" self-defense laws.
Sybrina Fulton is telling a Senate committee Tuesday that the laws, which generally eliminate a person's duty to retreat in the face of a serious physical threat, are confusing and inconsistent. She says neighborhood-watch volunteer George Zimmerman "got away with murder" in the 2012 killing of her son, largely because of Florida's policy.
Under the gaze of Fulton, Sen. Dick Durbin opened the hearing by saying the laws have been abused and urging Congress to consider how the policy would affect other gun legislation.
Texas Republican Sen. Ted Cruz said the laws make possible the right to self defense.
At least 22 states have some form of the law, which generally cancels a person's duty to retreat in the face of a serious physical threat.
Fulton says stand your ground doesn't mean chase after someone who has turned his back.
In July, a jury acquitted Zimmerman, 29, of all charges in the February 2012 shooting death of Trayvon, who was 17 and unarmed.