The college student who was sexually assaulted, killed, bound, and dumped in Brooklyn was last seen at a Lower East Side bar affiliated with Dorrian’s Red Hand, the Upper East Side bar where the convicted “preppy killer” Robert Chambers met Jennifer Levin before strangling her to death in Central Park in 1986.

The student, Imette St. Guillen, 24, stayed behind at the Pioneer Bar on the Bowery Friday night when her friend went home, police said. Sometime after 3:30 a.m. Saturday, St. Guillen then went to the Falls, a bar and pub on Lafayette Street.

Witnesses told police she left the Falls unaccompanied shortly after 4 a.m. when the bar closed.

One of the owners of the Falls, John Kekalos, said he did not know St. Guillen, but that he had “cooperated with police.” The Falls is connected to Dorrian’s by “common investors,” Mr. Kekalos said.

St. Guillen was found naked and wrapped in a comforter on Fountain Avenue in East New York. The medical examiner’s office ruled the woman’s death a homicide by asphyxia.

As of yesterday afternoon, police had not recovered St. Guillen’s mobile telephone – her friend had called to check on her later in the night – or clothing, and had made no headway in identifying the person who called 911 at about 8:30 p.m. Saturday to report the location of the body a mile away.

“The detectives are continuing intensive efforts to use any evidence and the victim’s movements prior to her death to identify her killer,” the chief spokesman for the Police Department, Paul Browne, said.

John Jay College of Criminal Justice, where St. Guillen was a criminal justice graduate student, announced that it is establishing a college scholarship in her memory.