Next talk to the owners or occupiers of the premises and find out what they know and if they have any ideas about the cause of the fire. They generally start thinking and talking about the cause after getting over the initial shock of the fire. Even if they are a suspect for deliberately lighting the fire, they should be given the opportunity to express their views. What they say might be different to what they told the Police and Fire Brigade investigators soon after the fire. It's all evidence which may prove to be valuable further down the track. Take particular note of the first things an insured tells you because it is often the thing which has been mostly on their mind since the fire.