Three people were found dead on a boat and are believed to have died from carbon monoxide poisoning at Saguaro Lake Saturday afternoon.

Here's what we know about three people dying from what officials believe to be carbon monoxide poisoning on a boat at Saguaro ...

The use of carbon monoxide was put under the spotlight during the Tour de France last year when the cycling website Escape Collective reported that riders from multiple teams inhaled the toxic gas to ...