She was brutally murdered alongside James Sharp (15), their bodies found viciously stabbed and beaten in an alleyway between Arapahoe Street and Magnolia Avenue in Los Angeles on November 21st 1969. Coinciding with her death, a typewritten note was found in her residence stating "SO YOU THINK YOU CAN FOOL THE OLD KILLER HA HA. I KNOW ALL YOUR MOVEMENTS AND THE TIME THEY ARE MADE. TIME IS SHORT, ENJOY LIFE WHILE YOU CAN. YOU ARE TO BEAUTIFUL TO LIVE AND I MUST KILL YOU. THE ZODIAC KILLER". The phrase "you are too beautiful to live" from this typed communication stood out.
Like so many of the Zodiac Killer phrases such as "man is the most dangerous animal of all" from 1932 and possibly "it was about time for her to die" from 1888, he wasn't averse to sourcing distant newspaper archives to generate impact in his letters. As his July 31st 1969, March 13th 1971, January 29th 1974, April 24th 1978 and May 2nd 1978 letters proved, he was quite prepared to use the movie industry as a source for inspiration. So, if the Zodiac Killer was responsible for this letter to Doreen Gaul, I decided to source newspaper archives regarding Hollywood and Los Angeles, famous for its movie industry, because this is where Doreen Gaul lived at the time of her murder. Again, I didn't have to look far.

So was this phrase another purposeful addition by the Bay Area murderer? An "old killer" who delved into the newspaper archives once again.