As the manhunt continues for the gunman who killed a health insurance exec in New York City, multiple reports say the investigation has a chilling new angle: The gunman appears to have engraved words on his bullets in a possible message. Law enforcement sources say the words "deny," "depose," and "defend" have so far been found on shell casings, per the New York Post, ABC News, and NBC News. Investigators are looking into whether the words might shed light on the motive in the killing of UnitedHealthcare CEO Brian Thompson.
Police have previously said the gunman appears to have targeted Thompson in the Manhattan shooting early Wednesday. The shooter also appeared to use a silencer and to expertly clear a jam in the weapon during the attack. The New York Times notes that police are poring over a huge cache of private and city camera footage in an attempt to track the shooter, who is believed to have stopped at a Starbucks beforehand. (More Brian Thompson stories.)