(SILVERHILL, Ala.) - Authorities Donna Henderson, 52, and her 18-year-old daughter, Samantha Combs, were found dead in their Silverhill home just before midnight Monday night.
Silverhill Police Chief Kim Wasdin says the women appeared to have been dead for a few days before they were found.
"We initially thought they died from carbon monoxide poisoning, but now we are investigating it as a homicide," Wasdin said.
Wasdin says the mother and daughter were last seen alive by neighbors Friday night. Two cats were also found dead inside their home. Authorities say there were no signs of forced entry.
Autopsies are being conducted to provide further explanation of how the women died.