04:28 PM ET 06.27 | Dallas Cowboys defensive lineman Josh Brent failed a second drug test and a Dallas County judge revoked his bond and sent him to jail on Thursday, according to the Dallas County District Attorney's office. The Dallas DA filed a motion on June 25 asking a judge to revoke Brent's bond because it was revealed he failed a drug test taken on June 19. Brent was out on bail after being charged with intoxication manslaughter resulting in the death last year of best friend and teammate, Jerry Brown. Brent is still on the Cowboys 90-man roster. Cowboys executive vice president Stephen Jones said the team would have no comment and Brent's agent, Peter Schaffer, said he's aware of everything involving the case, but wouldn't comment further.