Reconstruction:

Phase Observation Analysis
1. Paranoia Victim felt watched May have suspected foul play
2. Dog collapse Vomiting, panting Rapid inhalation of toxin
3. A/C activation Victim turned on unit Triggered full dispersal
4. Collapse Followed within 2 min Consistent with nerve agent onset

✅ Conclusion: Armand Keller died due to deliberate exposure to aerosolized organophosphate compound. Dispersal likely triggered by environmental heat and A/C system.