NEW YORK (AP) – A man was questioned by police on Sunday about the rape and killing of graduate student Imette St. Guillen, whose naked body was dumped on the side of a road.

Police called the man a potential suspect but wouldn’t elaborate. The man was being questioned at a police station Sunday night.

Earlier in the day, police officers, some in protective white laboratory suits, searched for evidence for several hours at The Falls, the Bowery drinking spot the Boston native visited in the early hours of Feb. 25. They also searched a commercial space above the bar. A police Crime Scene Unit van sat parked outside.

Authorities believe someone accosted St. Guillen after she left the bar. There are several security video cameras in the neighborhood, but police haven’t found any showing her in the area at closing time.

The 24-year-old criminal justice student and Boston Latin graduate was raped, strangled and suffocated with packaging tape that was wrapped around her face. Her body was found later that night dumped on the side of a desolate service road in Brooklyn.

Friends and relatives at her funeral in Boston on Saturday remembered her for her infectious smile, bold confidence, love of board games and penchant for high heels.

“You were and are the love of my life,” said her mother, Maureen St. Guillen. “When I need to speak to you it will be private. I will go into my heart, where you will always be.”

A $42,000 reward has been offered for information leading to an arrest and conviction.