Nearly 185,000 killings from 1980 to 2008 are unsolved.
"I asked, 'How many unsolved murders do you have?' They said 3,479 since 1969. That's when I broke down. I was in tears. I said, 'I know you guys are not going to solve these murders.'"
Every year in America, 6,000 killers get away with murder.
Despite dramatic improvements in DNA analysis and forensic science, police fail to make an arrest in more than one-third of all homicides.
"When my first son was killed, I was embarrassed and ashamed. Why did this happen to me? But when my second son died, I decided I'd had enough and wanted to be an advocate for murder victims,"
