New search warrants have revealed a chilling threat made by Carlton Johnson before a deadly mass shooting. Johnson told a security guard that the guard should probably wear a bulletproof vest the following night. This interaction occurred hours before the shooting took place.

The shooting happened at a high-rise building. Further details about the incident and the events leading up to it are available from the source.

The search warrants provide more information about the circumstances surrounding the mass shooting, including Johnson's ominous warning to the security guard.