'Woodlawn Jane Doe,' in 1976 cold case ID'ed. Culprit still at large 45 years later.

After 45 years, police say they know the identity of "Woodlawn Jane Doe."

In 1976 the woman was found brutally raped and murdered near a Baltimore County, Maryland, cemetery. Authorities announced last week that Margaret Fetterolf, of Alexandria, Virginia, who was reported missing a year earlier, is the Jane Doe. She was 16-years-old when she was killed.

The “Woodlawn Jane Doe” case began on Sept. 12, 1976, when detectives located the body of a young woman near the Lorraine Park Cemetery in Woodlawn, Maryland.

Officials said she was strangled and sexually assaulted. Her body was reportedly dumped there between 9:20 a.m. and 10:20 a.m., according to a witness who claimed they saw a white van in the area.

“She was bound, beaten, and had been strangled with a ligature. Chlorpromazine was found in her system, which may have been used to sedate her,” according to Baltimore County investigators. “The victim was also violently raped.”

Detectives initially relied on simple sketches of the victim to generate leads in the case but had little else to go on, police said. Investigators requested analysis of semen samples from items found near the victim’s body, among other pieces of DNA evidence in 2006.

The National Center for Missing and Exploited Children aided in the efforts to identify the “Woodlawn Jane Doe” and provided pollen testing, which led detectives to the Boston area in 2015.

Officials said a scientist with U.S. Customs and Border Patrol identified a blend of cedar and mountain hemlock pollen from the scene. Experts determined a possible connection to the Arnold Arboretum in Jamaica Plain, Boston, Massachusetts.

The National Center for Missing and Exploited Children released a new facial reconstruction image of Jane Doe 40 years after the killing..

The biggest break in the case came earlier this year when The National Center for Missing & Exploited Children and Bode Technology conducted additional DNA testing, which helped to identify “Woodlawn Jane Doe.”

“By knowing Margaret’s identity, detectives are now one step closer to catching the people responsible for her murder,” according to Baltimore County Police.

While police say they know the victim's identity, they have yet to make an arrest in the case. Anyone who may have information about this case is asked to contact Baltimore County detectives at (410) 307-2020.