mother. she was the most amazing woman i had ever met in my life. and then, suddenly, one day, she was gone poisoned by carbon monoxide. he was like i couldn t get a pulse, i couldn t get a pulse. her husband blamed of faulty water heater, police blamed him. you don t think this is an accident? no. there was one problem, and it was a big one, no one could figure out exactly how he might have done it. he s an expert in gases, he s analyses urologist. murder or an accident. did you kill your wife? hello, and welcome to dateline, hundreds of americans die every year from accidental carbon monoxide poisoning, but according to police in ohio, one of those deaths wasn t an accident, it was murder, and they say if anyone would know how to use a deadly gas to murder someone, it was their prime suspects. here is kate snow with deadly exposure. reporter: he s come back to where it all began, to the town, the streets he knew so well, remembering the old times
life. and then, suddenly, one day, she was gone. poisoned by carbon monoxide. he s like, i couldn t get a pulse! i couldn t get a pulse! i couldn t get a pulse! her husband blamed of faulty water heater. police blamed him. you don t think this is an accident. no. there was just one problem. and it was a big one. no one could figure out exactly how he might have done it. he s an expert at gases. murder or accident? did you kill your wife? hello and welcome to dateline. hundreds of americans die every year from accidental carbon monoxide poisoning. according to police in ohio, one of those deaths wasn t an accident. it was murder. they say if anyone would know how to use a deadly gas to murder someone, it was their prime suspect. here is kate snow with deadly exposure. he has come back to where it all began, to the tune, the streets he knew so well, remembering the old times when life was simple, love was young and the future held so much promise. taki
i couldn t get a pulse! the emts took kathy to the memorial hospital. mark followed along and diane was close behind. the news came in a matter of minutes. kathy was dead of acute carbon monoxide poisoning. do you remember when they told you she had passed? no, i do not. why do you think you don t remember any of that? i was poisoned with carbon monoxide. it s an odorless, tasteless, colorless gas. as a doctor, mark wangler says he knew he had been put poisoned with carbon monoxide because his head hurt and he felt so disoriented. neighbor diana says she remembers how mark took the news of kathy s death. he sought like a baby. tears were rolling down his cheeks. he was like, you know, this. he couldn t believe it had happened. i wanted to see kathy s face. i want to see kathy. to say goodbye?
told you that she had passed? no i do not. why do you think you don t remember any of that? i was poisoned with carbon monoxide. it s an older, -less tasteless, colorless gas. but mark says he knew he had been poisoned with carbon monoxide because his head hurt, and he felt that disoriented. marianne says she knows how he took the news of her death. he sought like a baby. tears were rolling down his cheeks. and he was like he couldn t believe it happened. i wanted to see kathy s face, i wanted to see kathy. yeah, it was tough. kathy s family members join him at the memorial. they only had been told that she had an accident. they told us in the room, and it was a hard moment. it s hard a man, turn around and call