Williams was sentenced to 50 years to life on the murder and attempted murder charges after telling a judge, "I didn't do it."
The show netted several tips, but in the end, Williams was found when NYPD detectives investigating an unrelated case dusted a crime scene for fingerprints, and he was tracked to New Jersey where he was arrested. An accomplice pleaded guilty to a lesser charge, testified against him and got nine years.
Walsh knows from experience that the families of victims need plenty of patience and persistence. His son's killing went unsolved for 27 years. By then, the drifter authorities believed responsible had already died in prison.
"One thing I know, we get justice," Walsh said of his show. "I was dying for justice in Adam's case."
Associated Press writer Tom Hays contributed to this report.
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