“Family members said the two men, ages 20 and 25, went out into the garage around 7 p.m. to listen to music…they had a vehicle running in the garage while they were listening to music.”
New Philadelphia men die from apparent carbon monoxide poisoning (timesreporter.com)
Read more about CO danger in garages: https://www.abe.iastate.edu/…/carbon-monoxide…/