With one of his ex-wives wearing a T-shirt that read "I Play Dirty," Eric Eugene Cooper pleaded guilty late this morning and was sentenced to 15 years in prison. State District Judge Mike Wilkinson imposed the sentence after Cooper, 30, changed his plea from not guilty to guilty. A jury convicted him Tuesday of tampering with a government document for altering the car title of one of his wives. Seven ex-wives and former girlfriends of the convicted bigamist, who is accused of pretending to be a U.S. Navy officer, sat together in a Harris County courtroom Tuesday as the jury's...