What to Know Crews from Tamarac Fire Rescue arrived after calls of what they say appears to be a carbon monoxide incident inside the home.

Rescue crews initially said that one person died inside the home of cardiac arrest and that the pet was found inside.

Broward Sheriff’s Office officials, who are now handling the investigation, later said that a total of two people died as well as the dog.

A man killed himself intentionally and his roommate and their dog accidentally by running his car in the garage of his Tamarac home.

Authorities responded to the home at 7932 Exeter Circle West just before 8:30 a.m. Wednesday after calls of what they say appears to be a carbon monoxide incident inside the home.

Tamarac Fire Rescue crews initially said that one person died inside the home of cardiac arrest and that the pet was found inside.

Broward Sheriff’s Office officials, who are now handling the investigation, later said that a second person was found dead inside and the dog had also died.

Officials said it appears to be a suicide and accidental death after they found a man dead inside a running car. The fumes went into the home and killed a second man and a dog, officials said.

The person who was found in the car left a note, and it appears the car was running all night, investigators said.

The men were later identified as 72-year-old Thomas J. Boyle and 64-year-old Michael Anthony Payson. Payson was the one who left the note, officials said.