A serial killer thriller is in development for Paramount and Warner Bros. Director David Fincher is to helm "Zodiac", which is now set to star Anthony Edwards. Robert Downey Jr. and Jake Gyllenhaal will also star in the feature.

Edwards will portray the partner of the lead police investigator on the case, played by Mark Ruffalo. Edwards´ character suffers a nervous breakdown due to the assignment.

Screenwriter Jamie Vanderbilt is adapting the film from the non-fiction novels by Robert Graysmith. Production will begin in August.

The books in context are "Zodiac" and the sequel "Zodiac Unmasked: The Identity of America´s Most Elusive Serial Killer Revealed."

Variety hosts further information on this picture.

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