Authorities in Minnesota report cracking a cold case -- thanks to DNA on chewed gum.
According to court documents, Dairo Giraldo-Soto is charged in a Lakeville jewel robbery three years ago.
The gum was found covering the ignition of a jewelry salesman's rental car.
Investigators say while the salesman was trying to start his car, someone grabbed $300,000 worth of jewels.
Police sent the gum to a crime lab for analysis, and Giraldo-Soto's name came up this June.
He's serving a five-year prison sentence in Missouri on another case.
The missing jewels have never been found.
