This confused and confusing movie tries to be based both on the real case of the worst serial arsonist in California history, and on a book by John Orr, a former arson investigator for the city of Glendale.
The script is clumsy and ill-formed, and plays a foolish trick on the audience regarding two of the characters, the arsonist and John Orr. Nothing is gained by this particular trick; in fact, a great deal of possible audience involvement is completely sacrificed.
The real case is depicted with some accuracy, but also some pointless fiction is inserted, and a potentially fascinating story is badly undercut.
The director is ordinarily a superlative cinematographer, and there's some good cinematography here, too. But there's also a great deal of silly camera trickery -- there's even a shot looking upward at two people (one a very minor character) from >under the foot< of one of them. The fire scenes are deeply unconvincing, and needn't have been.
One odd touch: two of the real-life arson investigators are depicted in the film, and one of them plays the OTHER one. And the other one also appears. Very complex and almost funny.