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Crystal Dawn Jack was last seen alive by her mother in the summer of 1997. (Halifax Regional Police)

Police say they've identified human remains found last summer in Middle Sackville, N.S., as those of a woman who disappeared 15 years ago.

Crystal Dawn Jack was last seen alive by her mother in the summer of 1997. She was 30 years old.

A forensic odontologist matched a skull bone to her profile.

Police said they suspect foul play in Jack's death and are convinced people know what happened to her, but they haven't come forward with information.

An investigation showed Jack may have been threatened by others who were known to frequent Halifax's north end.

Jack's case had been on the province's rewards for major unsolved crimes program for five years.