[5] On the night of her disappearance, Rahn was accompanied by a male and female friend at the apartment she shared with her mother, Judith, who was out on a date with her boyfriend.
Upon Judith's arrival home after midnight, she found that all of the lightbulbs in the apartment building's hallways had been unscrewed, leaving the halls completely dark.
Rahn's mother continued to receive anonymous calls in the ensuing years before eventually changing her phone number.
[13][7] Around 12:30 a.m. on April 27, Rahn was sitting with her male friend in the living room when they heard voices in the apartment building's hallways.
[7] Sometime around 1:15 a.m. on April 27, Judith arrived home accompanied by her boyfriend and noticed that the light bulbs on all three of the apartment building's floors had been unscrewed, leaving the hallways completely dark.
Upon further examination of the apartment, Judith found Laureen's purse and her brand new sneakers, a birthday gift, in the living room.
[10] One month before Rahn's disappearance, 15-year-old Rachael Garden went missing after she purchased a pack of cigarettes and chewing gum at Rowe's Corner Market on Route 108 in Newton, New Hampshire on March 22, 1980.
[16] Rahn's case has also been tentatively linked to the disappearance of 15-year-old Shirley McBride who was last seen leaving her half-sister's apartment on Union Street in Concord, New Hampshire at 9:30 p.m. on July 13, 1984.
[19] Decades later, police determined that suspected serial killer Terry Peder Rasmussen was living in the area under the pseudonym "Bob Evans.
[19] Rasmussen lived a mile and a half away from where Rahn disappeared and both she and Daneault reportedly closely resembled each other in spite of the difference in their ages.
She was last seen at a youth development centre and her naked body was found southbound at the Jearoldstown, Tennessee exit on Interstate 81.
[21][22] On October 1, 1980, Judith found she had been charged for three phone calls placed in California; she did not have friends or relatives there, and Rahn had never had any ties to the area.
[13] Five years later, in 1985, Karole Jensen, an investigator from the organization Wings for Children, called the physician, and he changed his story: he claimed that numerous young women and runaways occasionally visited his wife at their home and that one of the girls may have been Rahn.
[13] He also stated that Annie Sprinkle, a sex educator and former pornographic actress who allegedly knew his wife, might have had information regarding Rahn's disappearance and those of other runaway girls.
[13] The same year, a childhood friend of Rahn's named Roger Maurais received a phone call from a woman who claimed to be "Laurie" or Laureen.
[6] In 1981, after the receipt of the October 1980 phone calls, a close friend of Rahn's aunt Jobeth Swanson claimed to have seen her at a bus terminal in Boston; this sighting remains unconfirmed.
[13] Another unconfirmed sighting occurred in 1988, when a witness claimed to have seen a sex worker in Anchorage, Alaska, who matched Rahn's description.