---
category: PROMIS Scandal
summary: U.S. Attorney in San Francisco who reportedly authored a letter stating Ben
  Kalka did not obtain methamphetamine precursors from the U.S. government.
tags:
- Person
- PROMIS
- Lawyer
---

[William Shockley](/people/william-shockley/) was a U.S. Attorney in San Francisco. He reportedly wrote the letter that [Ben Kalka](/people/ben-kalka/) signed, stating that Kalka did not obtain his methamphetamine precursors from the [U.S. government](/places/united-states/). This letter was found by Detective [Sue Todd](/people/sue-todd/) in the Di Giorgio Extradition File.[^1]

---

[^1]: Seymour, Cheri. *The Last Circle: Danny Casolaro’s Investigation into the Octopus and the PROMIS Software Scandal*. First Edition. TrineDay, 2010.