A former Fairfax County police officer accused of fatally shooting a man who had his hands up has pleaded guilty to involuntary manslaughter.

Thirty-three-year-old Adam Torres struck the plea bargain Monday just before his murder trial was scheduled to begin in Fairfax, nearly three years after Torres killed 46-year-old John Geer of Springfield.

The plea calls for Torres to serve a 12-month sentence.

Prosecutors say Torres was angry over the breakup of his marriage and unfit for duty after fighting with his wife when he was called to Geer's home for a domestic dispute. He's accused of shooting Geer after a 40-minute standoff.

Torres said he thought Geer was dropping his hands and might be reaching for a nearby handgun.