LONGWOOD, Fla. -

Trayvon Martin's parents say Florida residents who initiate confrontations should not be allowed to invoke the state's "stand your ground law," which allows individuals to use deadly force if they feel they are at risk of being killed or seriously injured. 

Tracy Martin and Sybrina Fulton are appearing Tuesday before a task force that Gov. Rick Scott established to review the contentious law. 

Seventeen-year-old Trayvon Martin was shot and killed in February by neighborhood watch volunteer George Zimmerman during an altercation. Zimmerman has pleaded not guilty to a second-degree murder charge. 

The Martins allege Zimmerman started the confrontation. They say they will present the Citizen Safety and Protection task force with a 300,000-signature petition asking for the law to be repealed, or reformed to exclude those who initiate confrontations.