In 1970 he found communications more than a year old from the Riverside police , which indicated a resemblance to the Zodiac 's handwriting style .
Paul Avery , a writer for the San Francisco Chronicle , followed the Zodiac case from the outset .
In 1970 Paul Avery found communications more than a year old from the Riverside police , which indicated a resemblance to the Zodiac 's handwriting style .
Paul Avery , a writer for the San Francisco Chronicle , followed the Zodiac case from the outset .