DNA on napkin leads to arrest in cold case

Police charged Gary Hartman with the 1986 rape and murder of 12-year-old Michelle Welch.
1:25 | 06/25/18

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Transcript for DNA on napkin leads to arrest in cold case
It is exciting. But of course there's there's a lot of work to do. Even after doubt moment takes place for the second time and a few weeks the Tacoma police cold case detectives have solved a 32 year old case. Court documents say DNA pointed to Gary Hartman who was arrested two days ago an Al officially charged with the rape and murder of twelve year old Michelle Welch. Last month it was Jennifer bastion who was killed the same year and near the same location as Michelle charging papers say DNA pointed right at Robert wash birth. Who was being held on murderer and rate. The police chief as a message for all murderers if he can didn't run. Your own. If he height. You're wrong police department hid in plain sight. Living along the shores of lake still working as a community nurse at western state hospital married with children. Public cold case detectives at DNA from the murder scene to high tech profiler is. I'll match came back to Hartman and his brother detective real well followed apartment door restaurant he needed his exact DNA which she got from a napkin. I observed him. Using the napkin multiple times. He crumpled it up put it into a bank it. Then crumpled that date they've told crime lab tested the say it was an exact match Hartman was arrested moments later.

This transcript has been automatically generated and may not be 100% accurate.

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