[[William Shockley]] was a [[United States Attorney|U.S. Attorney]] in San Francisco. He reportedly wrote the letter that [[Ben Kalka]] signed, stating that Kalka did not obtain his methamphetamine precursors from the [[United States Government|U.S. government]]. This letter was found by Detective [[Sue Todd]] in the Di Giorgio Extradition File.[^1] --- ### Footnotes [^1]: Seymour, Cheri. *The Last Circle: Danny Casolaro’s Investigation into the Octopus and the PROMIS Software Scandal*. First Edition. TrineDay, 2010.