`` An individual who was in the process of being fired was involved in two separate conversations with his supervisor , '' Prince George 's County Police Chief Mark Magaw told reporters . Investigators have no information guns acquired illegally , official says . The FBI is investigating the incident as a possible hate crime and has asked for help from local law enforcement to identify suspects. The man calls himself a `` joker , '' police said .
Investigators have no information guns acquired illegally , official says . The FBI is investigating the incident as a possible hate crime and has asked for help from local law enforcement to identify suspects. The man calls himself a `` joker , '' police said .