Gareth Sewell Penn (born 1941 in Carmel, California) is an American true crime author and amateur detective known for being among the first non-journalists to write about the famous Zodiac Killer case.
Gareth Sewell Penn (born 1941 in Carmel, California) is an American true crime author and amateur detective. Penn was among the first non-journalists to write about the famous Zodiac Killer case.