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 dєatᩚh was a gunshot to the head and that it has been ruled a sᩚuᩚiᩚcide.
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.
Investigators had previously said they did not suspect foul play. Arnett had been described as an “overdue cyclist” who disappeared without his cellphone. Cops did not know what route he was taking on his bike.

Arnett was a cardiologist with Beth Israel Lahey Health, where he had practiced since 2021, specializing in echocardiography, CT, nuclear cardiology and preventive cardiology, according to Doximity.
The doctor is survived by his wife, Anne Bernard Arnett, and two sons, according to an online obituary.
Arnett was described as a “beloved husband, father, son and brother” and was an “avid outdoorsman” who enjoyed cycling, downhill and cross-country skiing, hiking, and fishing with his family and friends.

If you or someone you know is affected by any of the issues raised in this story, call the National sᩚuᩚiᩚcide Prevention Lifeline at 800-273-TALK (8255) or text Crisis Text Line at 741741.
If you are struggling with suicidal thoughts, you can dial the 24/7 National sᩚuᩚiᩚcide Prevention Hotline at 988 or go to SuicidePreventionLifeline.org.