The Yogurt Shop Murders: Could Improved DNA Technology Help Crack Case of 4 Teens Killed 30 Years Ago?

For 30 years, the mystery over who killed four teenagers has remained unsolved. Detective John Jones with the Austin, Texas Police Department was on duty that night in 1991. The images of what he saw that night still haunt him. Male DNA found at the crime scene was tested in 2017 but wasn’t enough to determine a match. Now, forensic experts are hoping better technology could identify the sample. Tune in CBS’ "48 Hours" on Saturday for the full story.