COLD CASE: Family seeks answers in murder of DC teen found dead in Charles County 37 years ago

It has been 37 years since the body of Deborah Ann Brooks was found stabbed to death along a dirt road. The 17-year-old D.C. girl had been reported missing after she didn't come home from a walk to a nearby drug store to fill a prescription.

Now, her brother is asking for help in a case that went cold over three decades ago.

However, the only evidence that was found showing any indication of foul play from Brooks' disappearance was a bag with the prescription inside and blood all over it. That bag was turned over to her brother, who then showed it to his mother.

"I remember walking into the place where she worked and her looking at me with these sunken eyes saying, 'Did you find your sister?'" Paul recalled. "And I couldn't say anything. I just handed her the bag and I just saw her heart just sink and she fell to her knees and started crying."

Paul was just 16 years old when his sister was killed. His family learned just a few days later that her body was found lying face up along a dirt road under a pile of drywall.

She was not sexually assaulted, and for many years, detectives have been trying to learn the motive.

They have interviewed a dozen people in recent years. Friends, family and acquaintances who might have known someone who may have had it out for Deborah and knew not only the Brookland neighborhood of Northeast D.C., but the area along Sharpersville Road in Charles County, Maryland.

Investigators say they have some DNA evidence, but it has not led them to a suspect so far.

"A lot of times, the suspects in these cases are found in the case files, and that being said, we have a number of individuals that we are looking at," said Charles County Sheriff's Office Sgt. Patrick Tona. "Since the case is 37 years old, a lot of individuals involved in this investigation are deceased, a lot of them have moved from the area, and again, we are just asking the public's help in getting that one piece of the puzzle that can help bring some justice to Debbie's family."

There is a $10,000 reward in this case. If you have any information, you are asked to call Charles County Crime Solvers at 1-866-411-TIPS.