IRVING, Texas - Dallas Cowboys practice-squad linebacker Jerry Brown was killed in a one-car accident early Saturday and teammate Josh Brent has been charged with intoxication manslaughter.

Police said the crash happened about 2:20 a.m. on a service road. Brent, 24, was driving his 2007 Mercedes at a high rate of speed when the vehicle hit a curb and flipped over at least once.

Police spokesman John Argumaniz said Brown, 25, was found unresponsive and was pronounced dead at a hospital. Officers conducted a field sobriety test on Brent and arrested him. His blood-alcohol content was not released.

"We are deeply saddened by the news of this accident and the passing of Jerry Brown," Cowboys owner Jerry Jones said in a statement. "At this time, our hearts and prayers and deepest sympathies are with the members of Jerry's family and all of those who knew him and loved him."

The Cowboys signed Brown to their practice squad on Oct. 24.

Brent, who had minor injuries, was being held without bond. A nose tackle in his third year with Dallas, Brent has played in all 12 games this season and has been a bigger presence on defense with starter Jay Ratliff battling injuries.

Brent, who played football at the University of Illinois, was arrested in February 2009 near campus for driving under the influence, driving on a suspended license, and speeding, according to Champaign County, Ill., court records.

In June 2009, Brent pleaded guilty to DUI. He was sentenced to 60 days in jail, two years of probation, and 200 hours of community service, and was fined about $2,000.