Buffalo Police Commissioner Joseph Gramaglia said the supermarket shooting suspect was wearing tactical gear and livestreaming as he entered the store.
"At approximately 2:30 today, an individual who the mayor stated is not from this area and is from hours away, drove to Buffalo and went to ... the Tops market. He exited his vehicle, he was very heavily armed. He had tactical gear. He had a tactical helmet on. He had a camera that he was livestreaming what he was doing,"
The suspect is an 18-year-old White male, he said.
He shot four people in the parking lot, Gramaglia said, three of whom died.
The suspect went inside the store, where a security guard and former Buffalo police officer engaged him.
"Because he had heavily armored plating on, the bullet had no round. The suspect engaged our retired officer and he was shot and deceased at the scene. He continued to work his way through the store," Gramaglia said.
He made his way back to the front of the store, where patrol officers were able to talk him into dropping his gun after he "put the gun to his own neck."
Police arrested the suspect and transported him to Buffalo Police Headquarters.