Is it known if Ross Sullivan was right or left handed? Apparently, Hartnell observed the gun holster was on Zodiac’s right side.
I ran a search on the forum "right+handed+Ross" and didn’t see this discussed: search.php?keywords=right+handed+ross&terms=all&author=&sc=1&sf=all&sr=posts&sk=t&sd=d&st=0&ch=300&t=0&submit=Search
I don’t know how anyone would know what hand Ross used to write. I think we’ll be combing some threads here for general questions like this. 
“…they may be dealing with one or more ersatz Zodiacs–other psychotics eager to get into the act, or perhaps even other murderers eager to lay their crimes at the real Zodiac’s doorstep.“ L.A. Times, 1969
I don’t know how anyone would know what hand Ross used to write. I think we’ll be combing some threads here for general questions like this.
I think there may be ways to triangulate if Ross was right-handed. For example:
–Family member recollections
–Handwriting analysis (for example: the yearbook salutations) might suggest which hand was used
–Photos showing which wrist Ross wore a wristwatch on (most wear a watch on the wrist they don’t write with)
–Any surviving footage or outtakes of the 1959 30 minute student film might show Ross writing, shaking hands with someone or wearing a watch.
–Also, if there is a murder scene in the 1959 student film, what hand does Ross use to hold a knife or gun?
