The New Hampshire Office of the Chief Medical Examiner has determined Matthew Goldstein’s cause of death was carbon monoxide poisoning, and the manner is pending.

A family of four was found dead inside a New Hampshire vacation home on Christmas from what appeared to be carbon monoxide poisoning.

Husband and wife Matthew and Lyla Goldstein and their adult daughters, Valerie and Violet, were found dead inside their vacation home on Province Lake Road on Christmas Day.

New Hampshire authorities said the cause of death for two more members of the Newton Goldstein family, found dead at their Wakefield, N.H. lake house on Christmas Day, was carbon monoxide poisoning.

Carbon monoxide poisoning has been confirmed as the cause of death for three members of a Newton family who was found dead inside their vacation home in Wakefield, New Hampshire on Christmas Day.

The cause of death for Matthew Goldstein was also carbon monoxide poisoning, and the manner is pending. The cause of death of Lyla Goldstein remains pending, according to officials.

Matthew Goldstein, 52, of Newton, died of carbon monoxide poisoning, the department announced on Dec. 27, 2024. The manner of his death remains pending.

Investigators previously said the cause of death of Matthew Goldstein, 52, was carbon monoxide poisoning. Violet Goldstein was a student at the Rhode Island School of Design.

Three found dead in a western Pennsylvania home apparently died from carbon monoxide poisoning — just the latest deaths this winter linked to the deadly, odorless gas.