SOURCES:

Suspect named in 1973 killings after genealogy analysis

dailymail.co.uk

DNA test solves 45-year-old double-slaying mystery in Montana

usatoday.com

Couple's 1973 Yellowstone County murder solved through genetic genealogy: Sheriff

abcnews.go.com

DNA test solves 45-year-old double-murder mystery in Montana

greatfallstribune.com

insideedition.com

Dinner Date with a Killer? 1973 Cold Case Murder of Young Montana Couple Has Just Been Solved

people.com

SOLVED: Clifford and Linda Bernhardt — Billings

billingsgazette.com