DALLAS -- Dallas Cowboys defensive tackle Josh Brent tested positive for marijuana while he awaits trial in a car crash that killed a teammate, prosecutors said Thursday in asking a judge to revoke the player's $100,000 bond and issue a warrant for his arrest.

Police have accused Brent of driving with a blood-alcohol content more than twice the legal limit during the Dec. 8 car crash that killed Jerry Brown, a Cowboys practice squad player.

Prosecutors said in their motion that Brent failed a urine test taken after a May 24 court hearing in which they had sought for his bond to be revoked due to problems with his alcohol monitoring. While the judge declined to do so, he did order Brent to provide a urine sample.

A hearing on the prosecutors' motion had not been scheduled Thursday afternoon. Brent's attorney, George Milner, did not immediately return a phone message and a spokeswoman for the Dallas County district attorney declined to comment.

Brent is required to wear an alcohol ankle monitor and appear for regular meetings with a county officer. Judge Robert Burns last month ordered a second form of monitoring to take breath samples, and for Brent to provide the sample after the hearing.