Fire investigation: origin, cause and responsibility

Fire investigation involves determining for each fire an "origin" and a "cause", the former being the location where a fire began (ignited) and the latter being the reason for the co-existence of fuel, oxygen and heat in proportions such as to cause ignition. Fire and arson investigators examine and interpret post-fire evidence so as to ascertain the origin and cause of fires. Later, technical engineering investigation of often needed so as to determine "responsibility", that is to determine where the blame lies as to why the incident occurred. Useful information is given relating to this conclusion.