New York ? She was a young graduate student who died in a gruesome way: raped, strangled and left on the side of a remote road in Brooklyn.

The stark contrast between the promising life of 24-year-old Imette St. Guillen and her ghastly slaying last weekend – and the mystery surrounding her final hours – perplexed and alarmed investigators, who fear her killer may strike again.

St. Guillen had been set to graduate this semester from John Jay College of Criminal Justice in Manhattan. She graduated from George Washington University in Washington.

Investigators theorize the killer may have abducted St. Guillen, who witnesses said appeared to be alone when she left The Falls, the bar where she was last seen early Saturday. But no suspects have been identified.

Later Saturday, authorities received an anonymous 911 call from a man who gave the location of St. Guillen’s body – and nothing more. Police traced the call to a public phone at a diner about a mile from where the body was discovered in a patch of weeds.