frederick lamar lane.is case has never been solved. >> it's never a moment in a day that i don't think about my brother and how he impacts every decision i make. >> reporter: during the last ten years, ten members of selena's family have been murdered. but it's lamar's murder that haunts her. she wonders should she have skipped the peace corps to stay home with him? >> what i have learned from the experience is i cannot help anyone without helping myself. i can't be a resource for anyone if i am not establishing myself in a very solid foundation. >> reporter: she talked about her brother at a speech for students rising above. >> i thought i could give him something, something of substance, some guidance but i later realized that he needed a man, a father, not just a big sister. >> reporter: more than half the homicide victims in the united states are african-american. 85% are men, most of them young. >> men have to step up. there is an accountability factor. we need our men to be role models. >> that is an