Most homes have smoke detectors; landlords often check smoke detectors themselves to make sure they are working since they could be liable. If the stove had been turned on for any period of time with the oil pan, then why didn't the smoke alarms go off? 3AM to 7AM is a long time, 4 hours! JMO a theory - 1. JG-T wanted to create at least a smoke alarm situation, perhaps even a fire, not to kill the family, but in order to create a drama with firetrucks and neighbors out in the streets. The purpose was to create commotion, chaos and a crowd of people so that by the time anyone noticed DA missing, they would think she went to a neighbor's or friend's house, had disappeared during the crisis rather than abducted/lured earlier. 2. Or perhaps JG-T did intend to burn the home down with the family in it, and he thought that no one would notice that one child's body wasn't there. JMO theory.