Ray Lamphere. Ray Lamphere was the farmhand who helped her cover up the murders. It is unknown if he murdered Gunness or if he was her accomplice or both. He was charged for starting the fire.
Fake Death. It's possible that Gunness faked her own death through the fire. It's possible that she took on the persona of Esther Carlson. She was spotted all over the country, and in 1931 in Los Angeles, "a woman named Esther Carlson was charged by police with poisoning a man for financial gain. Carlson looked like Gunness, was the same age that Gunness would have been, and there was no trace of Carlson to be found prior to the year 1908, which coincidentally was when Gunness 'died.'"
Buried. So, if Gunness really did fake her own death and take on the persona of Esther Carlson, then who is the woman who's body was found? Well, investigators never figured that out. Despite extensive tests, they could never link the body to Gunness or anyone else for that matter.