Unlike past cases in Montgomery County, when detectives employed the imaging technique, this time they were able to use identical DNA collected from two crime scenes. (Montgomery County Police Department) 
 
 - Montgomery County police said they have used DNA evidence recovered from separate crime scenes of a rape and murder that each happened decades ago to construct composite sketches of a possible suspect. DNA at the scene in 1994 matched DNA from the 1989 crime scene, and Homrock is convinced the same man committed both crimes. Parabon NanoLabs, a DNA technology company in Virginia that specializes in predicting physical appearance from unidentified DNA evidence, was used to construct two composite sketches of what the possible suspect may have looked like when the crimes were committed and what he may look like as he aged. While a potentially useful tool, police cautioned that the snapshot used assumptions about the suspect's age and body weight, which cannot be determined from DNA. She was not that different from me in age and she deserved some kind of justice which never came.” 
 
 Police believe the suspect is also connected to an attempted rape of a 25-year-old woman on Sept. 19, 1994. Police believe three crimes in 1989 and 1994 were committed by the same man: 
 
 On June 25, 1989, at approximately 10:15 p.m., a 52-year-old woman was walking on Lewis Avenue in Rockville when the suspect approached her from behind, assaulted her, and then raped her. The sergeant and his detectives have examined two other crimes reported near the Twinbrook Metro station from that time — including an attempted rape, in 1994, by an attacker armed with a knife whom the victim fought off. The suspect grabbed the victim and dragged her to the side of her residence where he attempted to rape her. However, she was able to resist and get away from the suspect before contacting police about the incident. The third incident happened on Oct. 3, 1994, when police found the body of 42-year-old Le Bich-Thuy to the side of her home in the 1600 block of Martha Terrace in Rockville. Police said their investigation revealed that Le Bich-Thuy had been assaulted, raped and then strangled. “Especially the fact that there was no suspect.” 
 
 After using DNA evidence recovered at both of these unsolved crimes, a DNA analysis determined that the same suspect committed both crimes, police said. (Courtesy of Montgomery County Police) 
 
 On a fall night 24 years ago, research biologist Le Bich-Thuy boarded a Metro train in the District, exited at the Twinbrook station in Rockville, and walked home.  Police Use DNA to Predict Appearance of Suspect in 1989, 1994 Rapes, Murder 
 
 Detectives Seeking Public Assistance in Cold Cases 
 
 Police released these DNA-based composite sketches of a man suspected of rape and murder in 1989 and 1994. “It is important to note that Snapshot composites are scientific approximations of appearance based on DNA and are not likely to be exact replicas of appearance,” Montgomery County police said in a news release. The snapshots are also not considered an exact replica of appearance, which can be altered by factors like smoking, diet, drinking, facial hair and hairstyle. — cannot be predicted by DNA analysis.” 
 
 Anyone who has information regarding the suspect or anyone who has details that might help investigators is asked to call the Major Crimes Division at 240-773-5070.
– Police in Maryland hope to track down a rapist and murderer who struck decades ago with an image crafted using his own DNA. After 42-year-old Le Bich-Thuy was raped and strangled after leaving Rockville's Twinbrook Metro station in 1994, DNA recovered from the scene was found to match DNA in the 1989 rape of a 52-year-old woman who'd departed the same station, reports the Washington Post. But "I don't think he did this just two or three times. This guy was targeting women in that area for at least five years," says Sgt. Chris Homrock, pointing to one case in which a woman escaped an attempted rapist days before Bich-Thuy's murder. To finally catch the attacker, police turned to Parabon NanoLabs, a Virginia-based company specializing in DNA phenotyping, reports Bethesda Magazine. Two computer-generated images were created using predictions of the suspect's ancestry, eye color, hair color, skin color, freckling, and face shape. Released Monday, they show how the suspect—white, with blue eyes and no freckles—might have appeared at ages 25 and 45. In a statement, per WTOP, Montgomery County police stress the composites "are scientific approximations of appearance based on DNA and are not likely to be exact replicas of appearance." Still, anyone who recognizes the man is asked to call the Major Crimes Division. "We're looking for any new information, anything these images might prompt someone to remember," says Homrock, noting "the common theme of these cases is they all start at the Twinbrook Metro." A reward of up to $10,000 is offered for information leading to an arrest, reports Fox 5. (In another cold case, police are using Twitter in a novel way.)