What Really Happened to Dr. Daniel Arnett on That Fateful Bike Ride?

A renowned Massachusetts cardiologist who vanished during a Saturday morning bike ride died from a self-inflicted gunshot wound to the head.

The Office of the Chief Medical Examiner in Boston told The Post that Arnett’s cause of death was a gunshot to the head and that it has been ruled a suicide.

Dr. Daniel Arnett, 44, was last seen riding his bicycle around 10 a.m. Saturday in Newbury. He was found dead shortly after 2 p.m. the next day near the Tendercrop Farm cow pasture.