i stand before you today not knowing how i'm walking right now because my heart hurts for my son. >> reporter: and you could hear the anger in his father's voice. >> i pledged i would not let my son die in vain. >> reporter: the parents' emotional words seemed to frustrate parents in the crowd who felt like trayvon martin could have been their own child, but rev reynolds sharpton warned them not to let their anger turn into violence. >> don't let them make you act in a way that they can say, see, that's what they were afraid of with trayvon. >> reporter: reverend sharpton encouraged the crowd to come back here on monday when he and others will lead a march to the city council meeting to continue demanding justice for trayvon martin. darlene jones for abc news, sanford, florida. we mentioned earlier that florida's governor has appointed a new prosecutor. the previous prosecutor volunteered to recuse himself. but this story nationwide. just hundreds of thousands of