Colorado Springs resident Rosa Mary DeSalvo died on September 6, 1995. Nearly 30 years later, police are still trying to find her killer.

According to a Facebook post from the Colorado Springs Police Department (CSPD), officers learned of the 86-year-old woman's death around 8:40 a.m., when someone called about a body at the Citadel Village Apartments on Galley Road.

READ: Police Still Looking for Suspects in 2017 Murder of Colorado Girl

Upon arrival, police discovered a deceased DeSalvo in her bed with apparent assault wounds. Investigators determined that her killer came in through the bedroom window and left through the front door.

Her caretaker, the last person to see her alive, had visited her the night before. Unfortunately, there were no witnesses to the actual crime.

Get our free mobile app

Despite interviews with numerous possible suspects, CSPD said they've never had enough evidence to make an arrest. Today, they're hoping to find the key to this case — and another one.

The Colorado Bureau of Investigation (CBI) believes DeSalvo's murder is connected to the killing of Marjorie Mock, a 96-year-old woman who died in the same apartment complex two months later on November 10, 1995.

LOOK: Police Identify Washington Woman as Victim in 1994 Colorado Cold Case

Police discovered that Mock passed away from blunt force trauma, which is also DeSalvo's cause of death.

"Due to the age range of the victims, location, and similar injuries it is believed these two homicides may be related," said the CBI. "The investigation into their deaths remains open."

If you have any information about these cases, please contact CSPD at (719) 444-7000.

25 True Crime Locations: What Do They Look Like Today?

Below, find out where 25 of the most infamous crimes in history took place — and what the locations are used for today. (If they've been left standing.)

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.

More From K99