Man arrested in stabbing of parents in restaurant as police probe girlfriend’s death

Benjamin Walsh, a Millis native, faces a variety of charges.

Vehicles sat parked in the drive way of where homicide related to a stabbing occurred in Needham. –Keith Bedford/Globe Staff

MILLIS — Mike Walsh was in a hospital emergency room Saturday night, being treated for wounds he sustained in a struggle with his son after the 24-year-old attacked his mother with a knife in a restaurant, when he heard there had been a fatal stabbing in Needham, he said.

Walsh immediately worried that the victim had been his son’s girlfriend, Olivia Bergstrom, whom he called “the sweetest kid,’’ in an interview Sunday at his home.

Soon, his worst fear was confirmed.

A sign asking for privacy was placed at the end of the Holliston driveway belonging to Bergstrom’s parents. —Keith Bedford/Globe Staff
Norfolk District Attorney Michael Morrissey spoke about the Millis stabbing and the Needham homicide during a news conference at police headquarters in Needham on Sunday. —Keith Bedford/Globe Staff