HAUPPAUGE, N.Y. — A woman from Maine who was found dead in New York, triggering an investigation into possible serial killings, will be remembered at a vigil to mark the first anniversary of her disappearance.

Lorraine Waterman and her son, Greg, are planning a candlelight vigil Saturday. It will be held near the place where Megan Waterman’s remains were found, along a remote Long Island beach highway.

Waterman, who was 22, lived in Scarborough, Maine. She disappeared after traveling to a hotel in Hauppauge, N.Y., to meet clients for sex.

Police say she was one of four women whose bodies were found dumped along Ocean Parkway in December.

The widespread investigation eventually led to six other sets of remains. Police say it’s possible there was more than one killer.