Frank Garcia did have a one-man issue of Genii sometime in the 1970s or 80s--can't recall at the moment, but I did see it recently in my file.
As Ian mentioned, Frank died unexpectedly of a heart attack. He was a heavy drinker, and he lived in a neighborhood in Manhattan that could be dangerous at night. There was also a fire escape outside the window of his apartment. Now, as anyone who lives in Manhattan knows, if you have a fire escape you are almost certainly going to be robbed if you don't have bars on the windows. Frank didn't have the money to put the bars up, so he NAILED his windows shut. The week he died there was a heatwave in Manhattan. Frank had no airconditioning and his windows were shut. It was probably over 100 degrees in his apartment. He had been dead for several days when he was found. The only reason they went looking is because his new wife was waiting for him to arrive at the airport in (I think) Phoenix and he simply never arrived. He died without a will and his son and new wife were engaged in a legal struggle over his copyrights. I have never heard of any resolution.