Missed evidence at WA's crime lab could've stopped the Green River killer in the 1980s

In 2001, Gary Ridgway was arrested for the murder of nearly 50 women and girls. During the 1980s and '90s, detectives struggled to catch the suspect known as the Green River Killer.

But according to some new investigative reporting, the Washington State Crime Lab overlooked some key evidence that could have linked Ridgway to the killings as far back as the 1980s, before he took more lives.

NBC News reporter Lewis Kamb talked with KUOW’s Kim Malcolm about the overlooked evidence — microscopic particles of a unique paint, that were found on the very first victim.