Prosecutors will not pursue charges in a road rage incident that led to one man's death.
William O'Brien, 63, died from a traumatic brain injury 10 days after the April 16 incident.
Librado Cena, 57, initially was charged with aggravated malicious wounding.
Cena told police he had grown so angry at O'Brien that he "wanted to get out his frustrations," according to a search warrant affidavit filed by Fairfax City police.
The documents said that Cena became angry at O'Brien for honking his horn at a traffic light on Pickett Road.
The affidavit said Cena told police he wanted to yell at the driver so followed O'Brien's vehicle into a Best Buy parking lot. As O'Brien got out of his car and began walking toward the store, Cena sprinted toward him and struck him in the head, court documents said.
About two hours later, O'Brien called 911 to report "a headache that's about to make my head blow off," according to court documents. Responding paramedics had to force their way into the home, where they found O'Brien unconscious on the floor.
The medical examiner ruled the death a homicide.