A District man who was driving a stolen car when it collided head-on with another car in Arlington on Aug. 22, killing its driver, has pleaded guilty to involuntary manslaughter.

Michael Gray, 28, was driving a car that he and another man stole in Prince George's County about 60 miles an hour on the wrong side of Route 110 near Arlington Cemetery when he collided with a car driven by Donald O'Connor, of Arlington, according to police.

O'Connor, 33, a lawyer and co-owner of a computer software firm, was talking to his wife on a cellular phone when the crash occurred. He died a short time later.

Gray, who suffered broken bones in his face and leg in the crash, pleaded guilty Monday to charges of involuntary manslaughter, to robbery and using a firearm in the commission of a felony. He is scheduled to be sentenced in Arlington Circuit Court on Dec. 14.

Police said the crash ended a two-day crime rampage involving Gray and William Bunn, who robbed a customer of $300 at an automated teller machine on Jefferson Davis Highway on Aug. 21.

Bunn, who was not injured in the crash, pleaded guilty to robbery, attempted robbery and two counts of using a firearm in the commission of a felony. Arlington Circuit Judge William L. Winston sentenced him to 14 years in prison.