BOSTON (AP) — A new lead investigator has been chosen to look into allegations of sexual abuse at a prestigious Rhode Island boarding school.

Wednesday's announcement Boston attorney Martin Murphy will lead the investigation into St. George's School comes a week after ex-Massachusetts Attorney General Scott Harshbarger was chosen to lead.

The Middletown, Rhode Island, school acknowledges it didn't report abusers to authorities.

An attorney for the accusers won't say why Harshbarger is no longer investigating. Harshbarger hasn't returned a call seeking comment.

Murphy represented Dr. Dirk Greineder, who was convicted in 2001 of killing his wife. They argued at trial a stranger did it.

In 2014, Murphy was named a special prosecutor in the 2009 death of a hospital patient. Three former hospital guards were indicted on manslaughter charges.

Murphy will be assisted by former Massachusetts Attorney General Martha Coakley.