Supposed Zodiac Killer: A merchant seaman Tarbox will not name. Tarbox was his lawyer very briefly.
Evidence for: In 2009, Tarbox claimed that, one night in the "early 70s," a man who said he was a merchant marine walked into his office, paid him $50, and confessed to being the Zodiac Killer. Then he left and Tarbox never saw him again.
Evidence against: Tarbox's law license was suspended in 1975 for five years. He says attorney-client privilege prevents him from naming the merchant marine, so even if police did investigate his claims (and it doesn't appear that they will), they wouldn't have much to go on.
Supposed Zodiac Killer: His stepfather, Jack Tarrance.
Evidence for: Kaufman says his stepfather's handwriting was similar to the Zodiac Killer's and that he found a bloody knife, a black hood like the one the killer wore, and film rolls with "sinister images." He sent the hood and stamps Tarrance licked to the FBI for analysis. According to Kaufman's website, his stepfather died in 2006.
Evidence against: Kaufman also thinks his stepfather might be the Black Dahlia and the Lipstick Killer (although another man confessed and was convicted of those murders). No word on the results of those items sent to the FBI.
Supposed Zodiac Killer: His father, George Hill Hodel
Evidence for: Hodel is a former LAPD homicide detective who has written several books on the crimes he believes his father, who died in 1999, committed. He says his father had the same shoe size as the Zodiac Killer, and his father was a columnist for the San Francisco Chronicle in the 30s -- the same newspaper the Zodiac Killer sent taunting letters to.
Evidence against: Hodel's father would have been a few decades older than the Zodiac Killer was believed to be. Like Dennis Kaufman, Hodel also claims his father was the Black Dahlia murderer and the Lipstick Killer. Oh, and the Jigsaw Murderer in the Philippines. The LA Times' Daily Mirror called his book where he tried to connect his father with the Zodiac murders "a joke," noting that Hodel says his father's shoe size was 10E, like the Zodiac Killer, but one of his other purported victims was killed by someone wearing a size 6 or 7 shoe. Also, in some cases, the handwriting samples Hodel offers up as his father's to compare to the Zodiac Killer's actually came from Elizabeth Short (the Black Dahlia victim. Or maybe she's the Zodiac Killer, too).
Supposed Zodiac Killer: His friend, Louis Myers.
Evidence for: Kenney came forward earlier this year and said that, in 2001, Myers told him on his deathbed that he was the Zodiac Killer. He also "begged" Kenney to write a book about it. Myers lived near some of the murders and may have gone to high school with two of the victims and worked with another victim. Another friend of Myers' said he confessed to him in 1976 that he was the killer, but the friend thought Myers was joking. He's not so sure about that now!