NEWTOWN, Conn. (AP) One of six educators gunned down with 20 children at an elementary school has been buried with her engagement ring.

Rachel D'Avino's boyfriend, Anthony Cerritelli, planned to ask her to marry him on Christmas Eve. D'Avino's sister, Sarah, said the ring originally belonged to her grandmother. She said Cerritelli had it restored and a week before the shooting and had asked her mother permission to marry Rachel.

Sarah D'Avino said Wednesday that her sister, a behavioral therapist who worked with special needs children, had started working at Sandy Hook Elementary School about two weeks before she was killed.

A gunman shot his way into Sandy Hook Elementary School on Dec. 14 and slaughtered 20 first-graders and six educators. The gunman, who had also killed his mother that morning, committed suicide as police arrived.