NBC Washington has obtained new information regarding the murder Wednesday at a Fairfax County, Va., barber shop.
A friend of suspect Hung T. Nguyen shared letters with NBC Washington Thursday morning that were left at his home. According to the letters, the shooting stemmed from an incident involving the suspect's lunch being thrown away.
Sonny Ha knew Nguyen for a few years and had shared his home with him for the past week. Tuesday night, Nguyen gave him nine letters written in Vietnamese, including one addressed to Ha himself. Ha read from that letter for NBC Washington.
Nguyen had worked at the barber shop, and in his letter to Ha, he complained about a coworker insulting him by throwing out his lunch.
"I think I have to do something to him," Nguyen wrote. "I'm going to die or he's going to die."
Last month, Nguyen went to Vietnam to visit family there for the last time, though he didn't let them know it was goodbye, Ha said. Nguyen seemed obsessed with dying, Ha said.
"He says he is very hurt," Ha said. "He doesn't want to live anymore."
Fairfax police said Nguyen, 44, of Annandale, Va., turned himself in to investigators late Wednesday night at the Sully Police Station in connection to the fatal shooting, NBC Washington's Tracee Wilkins reported.
Nguyen has been charged with second-degree murder. He is being held without bond.
Investigators said Nguyen entered the Belle View Barber Shop in the 1600 block of Belle View Boulevard at 2:17 p.m. Wednesday, fired several rounds and fled.
A 39-year-old man, identified as Le D. Hoang, died at the scene. A 38-year-old man who was struck twice in the leg was taken to Inova Fairfax Hospital and is expected to survive.
An elementary school near North Kings Highway and School Street was locked down for a time as the search focused on that area, but students were eventually allowed to go home.
Police have requested surveillance video from the Safeway in the shopping center.
Stay with NBCWashington.com for more information.