Old-fashioned detective work and advances in forensic science led to the identification of a suspect in the killings of four teenagers in Austin, Texas, in 1991, officials said.

Austin police hosted a news conference to provide information regarding a breakthrough in the 1991 I Can’t Believe It’s Yogurt murder investigation.

Relying on DNA from beneath a victim's fingernails and a bullet casing found in a drain, Austin police on Monday described how they unlocked the identity of the person they say killed four young women in a yogurt shop on Anderson Lane nearly 34 years ago.

The quadruple homicide at a yogurt shop off Anderson Lane in Austin made headlines in 1991, and KXAN has followed the incident since it occurred.

Austin police to give more information on the breakthrough in the 1991 I Can't Believe It's Yogurt murder case. Here's how to watch.