Ms. Haddon, who carved a path all her own in the modeling world, was found dead on Friday morning from what authorities believed was a carbon monoxide leak.

Model and activist Dayle Haddon has died from suspected carbon monoxide poisoning at a Pennsylvania home. She was 76. Solebury Township Police responded to a call Dec. 27, just after 6:30 a.m., regarding a man, 76, passed out at a home in Bucks County, police reported. A woman, 76, was found dead on the second floor of the home.

Dayle Haddon, a model who graced magazine covers and appeared in TV shows and films including “North Dallas Forty,” “Max Headroom” and “The Hitchhiker,” died in an apparent carbon monoxide leak in Solebury,