Investigators have determined that a fatal Henderson house fire in August was set by the 17-year-old victim.
The Star Tribune reported that according to the state fire marshal's report, arson was the cause of the Aug. 29 blaze that killed Amee Lee Thiel.
Thiel had recently moved in to her father's Henderson home. Firefighters were called to the house around 4:50 a.m. and the doors were locked.
According to the Mankato Free Press, authorities are having a difficulty time determining whether Thiel wanted attention from the fire or if it was a suicide attempt.
There were at least four fires started in various areas of the house, according to the report but Thiel was found in the basement surrounded by stacks of cardboard and paper. She died of smoke inhalation and carbon monoxide poisoning.
There were no smoke detectors on during the time of the fire but investigators found a box of five smoke alarms in the basement.
Thiel was a strong suspect in a similar an arson fire that destroyed a mobile home in Mankato that was owned by the mother of an ex-boyfriend.