How Old Was the Zodiac?

A forum thread started by AK Wilks on February 14th 2014 asks the question 'how old is the Zodiac'. Today, if he were still alive would most probably be in his 70s or 80s. From the eyewitness testimony of Michael Mageau at Blue Rock Springs, Bryan Hartnell at Lake Berryessa, along with the three teenagers and Officer Donald Fouke at Presidio Heights, a widely held consensus, is that the Zodiac Killer was somewhere in the range of 25-45 years of age. In other words, not a very accurate picture. Even the two composite sketches varied, only days apart. However, after reviewing the facts of the case, AK Wilks decided on a range of around 25-30. If we take the mid-range of 27.5 and rounded it up, that would make the Zodiac Killer approximately 73 years of age, as of 22nd May 2014. So, he could very well be in a neighborhood near you.