---
category: PROMIS Scandal
created: 2025-08-05
location: Hercules, California
relations:
- fn: 1
  role: shared a source during Project Abbreviation
  start: 2000-02
  type: partner_of
  with: '[[Sean McDade]]'
summary: Police detective of Hercules, California, who according to Cheri Seymour
  accompanied the RCMP investigator Sean McDade in February 2000 and believed a homicide
  case of her own was tied to PROMIS.
tags:
- Person
- PROMIS
- LawEnforcement
updated: 2026-09-22
---

Sue Todd was a police detective in Hercules, [California](/places/california/). According to [Cheri Seymour](/people/cheri-seymour/), Todd accompanied the [RCMP](/organizations/royal-canadian-mounted-police/) investigator [Sean McDade](/people/sean-mcdade/) to meet Seymour in Southern California on February 19, 2000, during [Project Abbreviation](/events/project-abbreviation/); the two had found that they shared a source, and Todd believed that a double homicide she had been investigating for three years was connected to [PROMIS](/programs/promis/). Both carried 9mm service pistols to the meeting. Todd was Seymour's point of contact with McDade when he believed he was under [ECHELON](/programs/echelon/) surveillance, and she later told Seymour that McDade had returned to police work in his hometown.[^1]

[^1]: Seymour, Cheri. *The Last Circle: Danny Casolaro's Investigation into the Octopus and the PROMIS Software Scandal.* TrineDay, 2010. Sole source; no record of Todd or of the Hercules homicide case was found in the congressional or Justice Department reports or in the *Toronto Star*'s coverage of 2000.