 Arson investigators testified as to how they had located the origin and cause of the house fire , stressing that the multiple unconnected , small fires they had found in the home 's basement were evidence of the fire having been set purposely and that char patterns on the house 's floors were evidence of a liquid accelerant having been used to start the fire . The living room floor had contained the most significant amount of accelerant , and the trail of accelerant had ended at the door of the master bedroom , which had been open while the fire burned . The state of the bedroom door contradicted Green 's prior testimony to investigators that her bedroom door had been closed and she had only opened it briefly to look into the hallway . 
