MIAMI (AP) Friends of Trayvon Martin the black teenager shot and killed by a neighborhood crime-watch volunteer in Florida say they find it hard to believe he would have started a fight.

One his former football coaches says: "It just wouldn't happen. That's just not that kid."

Martin was killed last month in a case that has set off a furor over race and justice. The white and Hispanic man who shot him, George Zimmerman, has claimed self-defense and has not been arrested. But state and federal authorities are investigating.

Those who knew Martin have portrayed him as a laid-back young man who had a good sense of humor and was extremely close to his father. The family's lawyer says he had never been in trouble with the law.