While not exact, I think you can see that Allen's handwriting (Right) bears a striking resemblance to the Zodiac's. Some believe that since Allen was ambidextrous ,he was able to fool the handwriting experts. Allen's dominant hand was not his left hand, but that is what he told the handwriting analysts.And when they asked him to provide a handwriting sample using his right hand, he told them that he could only write with his left hand, and that was a lie! Allen's brother, Ron, confirmed to investigators that "Leigh" was ambidextrous. Many investigators now believe that Allen wrote the Zodiac letters using his right hand.