frame of his 30-foot trailer that was demolished and burned. >> mr. otto's property looked like manmade hell, a person that was in the process of destroying everything. trees, digging holes, destroying the dirt road that goes into the property. >> but the one thing otto hadn't yet destroyed was the fire pit. >> i was very happy to see that the fire pit hadn't been disrupted all that much. >> almost immediately detectives got a break. in the embers they found a house key. >> i took the key, cleaned it up, placed it in the door lock of shamaia smith's home and it unlocked and opened the house. so it was shamaia smith's house key. >> but this didn't prove otto killed her. >> in the fire pit, police also