A Boise man pleaded guilty to stabbing and killing a woman in Ada County more than 25 years ago.

Lee Miller pleaded guilty to second-degree murder in connection with the death of Cheryle Barrett, who was stabbed to death in April 1994. The crime went unsolved for more than 20 years.

This comes just weeks after Miller pleaded guilty to another murder in Washington.

In January, police arrested Miller in connection with the strangling of another woman, Marilyn Hickey in 1992 in Bremerton, Washington. A prosecutor in Ada County explained in court Wednesday, police had DNA matches in the two cases before they knew it belonged to Miller.

Miller’s name was a common denominator in both cases, so he was followed for some time in Ada County until he dropped a cigarette. DNA was taken from the cigarette, and his DNA matched the case here and the case in Washington.

His sentencing in the Idaho case is scheduled for Aug. 21.