It's been 41 years since a Manchester woman was reported missing and investigators still don't know what happened to her.Case status: Missing personCity/town: GoffstownYear of disappearance: 1981Denise Beaudin was 23 years old when she vanished. She was last seen by family on Thanksgiving in 1981, with her boyfriend, then-37-year-old Terry Rasmussen. Officials said Rasmussen was also known as "Bob Evans" in New Hampshire.He was identified as the killer of three children and a woman, whose remains were found in barrels in Allenstown. >> Watch: 'The Middle Child,' a documentary about the unidentified victim in Bear Brook murdersAuthorities said that Beaudin’s family visited her Hayward Street home in Manchester on Dec. 1 to find that Beaudin and Evans were gone. A missing person report was not filed until 2016. Beaudin was described as white and 5 feet, 4 inches to 5 feet, 6 inches tall. She weighed 120-140 pounds at the time she was last seen. She has brown hair, brown eyes and a noticeable overbite.Authorities said that after graduating high school, Beaudin moved around before settling in Manchester. She used to work at General Cable on McGregor Street and the Demers Nursing Home on Hackett Hill Road. Watch a timeline of the known whereabouts of Rasmussen in the player below.Rasmussen died in prison in 2010. He was serving time for killing his common-law wife in California.Authorities said that based on what they know about him, Beaudin is likely dead. Can you help police solve this case? Submit a tip to the New Hampshire Cold Case Unit.