# Crime Sentinel - **Event:** [Meta Global AI Developer Hackathon](https://cerebralvalley.ai/e/meta-ai-developer-hackathon) - **When:** Oct 26, 12:00 PM โ€“ Nov 4, 9:00 PM (EST) - **Where:** Online - **Team:** [Jensen Ang Ji Jin](https://cerebralvalley.ai/u/JensenAng) - **GitHub:** https://github.com/hongchenzhijin/Crime-Sentinel - **Demo video:** https://youtu.be/3LYc15WseHI - **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery - **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1911 The most dangerous True Crime Community spaces aren't public. They sit behind admission questions ("are you a journalist?") and invite-only chats, where keyword filters and public scraping can't reach. Crime Sentinel sends in a governed AI research persona, powered by Meta Muse, to find communities that glorify violence before they act: ๐Ÿ•ต๏ธ A Muse-written persona answers a closed group's admission questions and is later invited into a secret chat ๐Ÿ›ก๏ธ An independent Safety Governor (hard rules plus a separate Muse judge) checks every message. The persona never praises, encourages, or commits to anything ๐Ÿ‘๏ธ Muse vision reads posts and images, then one long-context call rates the whole community ๐Ÿ“จ Muse drafts an evidence-backed report to Meta Integrity, and a human approves it before it is sent ๐Ÿ” Every observed post flows into a human review console with explainable classification, a GraphRAG network, trends and evaluation On our test set, Muse flagged no harmless posts as harmful. A keyword filter flagged 45%. It assesses content and communities, never people: no identity resolution, no individual threat scores, and no automated reports to police or schools. ๐Ÿงฐ Built with: Meta Muse (muse-spark, muse-image), FastAPI, React, PDQ perceptual hashing, GraphRAG (Louvain), multilingual embeddings, Cytoscape ## More from Meta Global AI Developer Hackathon - [Murugan](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1908) - [PollPilled](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1909) - [Potato](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1910) - [AEGIS MESH](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1912) - [Razeen Jubair](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1913) - [Clips Kitty Game Day](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1914) --- Markdown version of https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1911. Site index for agents: https://cerebralvalley.ai/llms.txt ยท full text: https://cerebralvalley.ai/llms-full.txt