How werwe the crimps insulated?
Do simular crimps by the POCO look safe?
Was weather (lightning) a factor?
Is there any evidence of other than electrical causes?
Was and neutral wire bare back to the transformer? and if so was it in contact with any building metal parts?
Questions that occur to me now that may or may not pertain. Truely accurate fire investigation is a lot of work and can be costly. But if not done can and does lead to too many fire caused by electrical origion conclusions when not necessarily true.
A quick sign off of the investigation with realitively little money spent make the cities/counties/state bean counters happy.