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Secret marital strife between top San Francisco cops before horrific murder-suicide — as family friend speaks out

San Francisco’s former deputy police chief and her husband had a turbulent marriage before he shot her and their daughter dead, a close family friend told the California Post. Ann Mannix, 65, and Katie, 24, were killed by Kevin Mannix, 68, at their Marin County home Sunday evenin.

Curated by Brimstone Editorial Desk · Source: NY Post ·
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Expanded Context

Brimstone Report is tracking this as a curated crime & justice brief. The source report from NY Post says: San Francisco’s former deputy police chief and her husband had a turbulent marriage before he shot her and their daughter dead, a close family friend told the California Post. Ann Mannix, 65, and Katie, 24, were killed by Kevin Mannix, 68, at their Marin County home Sunday evenin.

This page is not original reporting. It gives readers the Brimstone view of the story: what is known from the attributed source, why the topic matters, and where to continue reading the original report.

At publication, this brief is anchored to a single attributed source. Readers should treat early details as provisional until additional reporting, official statements, or documents appear.

Why It Matters

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Key Facts

  • Primary source: NY Post
  • Published: Oct 12, 2026, 4:52 PM UTC
  • Coverage area: Crime & Justice
  • Brimstone role: curated summary, explanation, and source attribution
  • Topic signals: developing story metadata

Timeline

  1. Source published: Oct 12, 2026, 4:52 PM UTC
  2. Brimstone indexed: Added to the curated Brimstone feed and linked to related coverage.
  3. Next update to watch: Additional sourcing, official confirmation, court or agency records, or follow-up reporting.

Source Attribution

This Brimstone page summarizes and contextualizes a third-party report. Continue to the original publisher for full reporting, documents, quotes, and updates.

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