A typewritten letter was postmarked Starkville, Mississippi on March 24th 1964, addressed to Mr. Melvin Belli, Attorney at Law, San Francisco, California, with a return address of R. A. Wagner, 1302 E. Capitol Street, Jackson, Mississippi. Investigators could find no such number on E. Capitol Street and no R. A. Wagner by searching the Polk Directory in Mississippi. The letter read:
"Old Dago Belli says of Dallas, 'This city stinks', We have news for you jelly belli -- that's your upper lip you smell. Furthermore, if you're not careful some-body's going to put a slug of hot lead between those beady eyes of yours". It was signed "The Commitee" and followed by "Remember, San Francisco is no sanctuary."
On August 26th 1976, a personal advertisement mentioning "The Imperial Wizard" and beginning with "ZODIAC" was placed in the San Francisco Chronicle to run for one week. This advertisement carried the initials R. A., just like the threatening letter from Mississippi addressed to Mr. Melvin Belli.