EVERETT, Wash. — Authorities in Skagit and Snohomish County have released composite sketches based on DNA evidence of a suspect in an unsolved, 30-year-old double slaying case of a young Canadian couple.

The couple from British Columbia were found dead in two separate locations after they failed to return home from a visit to the Seattle area in 1987.

The sketches show a Caucasian male in his 20s, 40s and 60s.