DURHAM, N.C. — North Carolina will not retry a white police officer who killed an unarmed black man who had just survived a car crash, state officials said Friday. The officer’s trial ended in a hung jury.

Officer Randall Kerrick killed 24-year-old Jonathan Ferrell at 2:45 a.m. on Sept. 14, 2013, shooting at him 12 times and hitting him 10 times on a dark street in a Charlotte subdivision. Officer Kerrick was charged with voluntary manslaughter. His trial ended this month in a mistrial, with four jurors wanting to convict and eight to acquit.

“In consideration of the jurors’ comments, the evidence available to the state and our background in criminal trials, it is our prosecutors’ unanimous belief a retrial will not yield a different result,” a North Carolina senior deputy attorney general, Robert C. Montgomery, wrote to the district attorney for Charlotte and Mecklenburg County.

Mr. Montgomery said that the charges against Officer Kerrick would be dismissed.

Mr. Ferrell’s mother, Georgia, said by telephone from her home in Tallahassee, Fla., that state prosecutors had called her around 9:30 a.m. on Friday to tell her they doubted they could win a second trial.