Accidental carbon monoxide poisoning is the cause for hundreds of American deaths every year, but according to police in Lima, Ohio, one of those deaths wasn’t an accident – in this Dateline classic, they say it was murder. Kate Snow reports. Originally aired on NBC on June 24, 2011. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.