(CNN) -- His declaration grabbed the ear: I am the son of a mass murderer whose dark deeds and enigmatic identity spawned silver screen thrillers. I am the son of the Zodiac Killer. Gary Stewart of Baton Rouge, Louisiana, may be the latest person to claim lineage with the infamous psycho murderer who inspired the movies "Zodiac" and "Dirty Harry." But he's not the first to say he is descended from a man who police suspect killed five people in northern California in the late 1960s, then taunted the public with creepy letters to the media. Zodiac has never been caught. And he has, in all, 37 people's lives on his conscience, he has said in his cryptic claims of responsibility.
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Survivor says photo is "not inconsistent" with what he saw of killer
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Zodiac Killer, who has never been caught, claimed to have killed 37 people
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Each prospective child of Zodiac points to a different man as the killer
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Gary Stewart is the latest and has compiled his account into a new book
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@placeholder sleuthed for a decade through government files and news articles and hunted down relatives to dig up evidence, HarperCollins said.
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Only two people are believed to have survived @placeholder's attacks.