According to a former CHP officer, he is indeed still alive, and very very old. 92 to be exact, and still living in California. The officer also claims an arrest was never made due to a massive coverup that involved a judge, DA's and sheriff's dept officials.
Ah,I don't buy any of his bull! The Zodiac Killer is dead,man. This dude's just pimpin his book. I mean,nothing wrong with that but just sayin,I don't think so.