The Manassas shooter announced the attack before he fired

Around 7 a.m. on 30 September, Marvin Grant, 37, told a coworker at the United Rentals facility in Manassas, Va., that "three people are going to die," then shot three colleagues, Police Chief Douglas Keen said, according to WTOP. Police identified the dead as Christopher Serrano and Richard Lamot; a third employee was hospitalized in stable condition, per WTOP. Keen also said there was "some kind of altercation" before Grant pulled a pistol, per ABC News. The Manassas workplace shooting was announced before it began.

Grant, a relatively new employee, made the statement shortly before opening fire, WJLA reported. He later died of a self-inflicted gunshot wound; police identified no clear motive, per NBC4 Washington. Two unrelated attacks came earlier. On 31 August, Bank of America vice president Erin Piacenti was fatally stabbed in Times Square in an attack NYPD Commissioner Jessica Tisch said appeared random and unprovoked, per Al Jazeera. On 22 September, a man allegedly strangled a nurse with the stethoscope around her neck in the Auburn Community Hospital emergency department, per CNY Central.

Threat assessment calls this leakage: a person communicating intent to a third party before acting. In Manassas the warning left little time to act; the lesson applies to earlier warnings. Two more seams sit beside it. A new employee has no behavioral baseline, so concerning conduct has nothing to stand out against. And violence reaches employees beyond the office, on clinical floors and public streets, as Auburn and Times Square show.

• Make reporting a threat as easy as hearing one: a channel that reaches the threat assessment team in minutes.
• Treat a stated intent to kill as an immediate police call. Route lesser statements and confrontations to triage with a named owner, a time standard, and a documented decision.
• Give new hires deliberate attention; supervisors and peers are their only baseline.
• Extend duty of care to clinical floors, client sites, and field work.

OBSIDIAN — Counterintelligence is designed to set a reported concern that falls short of an imminent threat beside the access, travel, cyber, and open-source data a program already governs. Reports arrive through APEX, and risk scoring weighs corroboration across domains, which matters when a new hire has no baseline. The threat assessment team directs inquiries and makes every determination; OBSIDIAN surfaces and organizes.

The Manassas warning was spoken plainly. What a program controls is whether every warning has a path, an owner, and a clock. That is the discipline behind detecting intent, not just events.