Somebody murdered 15-year-old Stephanie Bauman 42 years ago. Today, police are still on the hunt for a Colorado killer.

According to the Colorado Bureau of Investigation (CBI), investigators from the Arapahoe County Sheriff's Office (ACSO) discovered Bauman's remains in a ditch near Country Road 173 and US 36 on October 28, 1980.

Get our free mobile app

Police noticed bruising on her body, but that wasn't what killed her. Instead, they believe her attacker abandoned her in the ditch, leaving her to die of hypothermia.

FOX31 reports that Bauman's killer had stripped her of her clothes. Officers found them piled up around a mile away from her remains.

RELATED: Police Still Trying to Solve Nearly 30-Year-Old Colorado Cold Cases

The station notes that Bauman was staying in a group home for "severely troubled kids who had nowhere to go." Two weeks before her death, she allegedly ran away from the home; however, she had been trying to connect with family members living out of state.

"The Colorado Bureau of Investigation and Arapahoe County Sheriff's Office are working to solve this cold case murder," said FOX31 reporter Digital Dara in a Friday (Oct. 28) report. "Her case is still unsolved today. They've collected DNA evidence but [have] no suspect information."

READ: Colorado Woman Identified as Victim in 44-Year-Old Cold Case

If you have any information about this case, law enforcement asks that you reach out to ACSO by calling (303) 395-4711 or by emailing coldcase@arapahoegov.com.

Stephanie Bauman's murder is one of the many open investigations in the Centennial State. Read more about Northern Colorado's most puzzling cold cases in the gallery below.

Northern Colorado's Most Puzzling Cold Cases

These cases are cold, meaning they are no longer being actively pursued due to a lack of evidence. However, that doesn't mean they are unsolvable — it's always possible that someone knows something. While each case poses a frustrating mystery, here are the 10 most puzzling cold cases in Northern Colorado.

14 of the Most Notorious Killers With Connections to Colorado

Read on to learn about some of the most infamous serial killers who have unnerving Colorado connections.

More From ESPN Western Colorado