 The two arson victim names are Cosgrove and Seagrave. Cosgrove is  after the real life Chicago Fireman/Author William Cosgrove (qv)  who served as Robert De Niro (qv)s technical advisor for the  movie. Seagrave is the name of a fire apparatus (fire and ladder  truck) manufacturer.  The firehouse where Engine 17 and Truck 46 were quartered is the  real, in