Having dismissed one of Atlanta’s pre-eminent defense attorneys in order to defend himself on charges of aiding and abetting terrorists, Ehsanul Islam Sadequee on Thursday spent hours cross-examining his convicted co-defendant, eliciting testimony that seemed to bolster prosecutors’ charges.

Sadequee’s wide-ranging cross-examination of former Georgia Tech student Syed Haris Ahmed — convicted after a June bench trial before U.S. District Judge William S. Duffey Jr. in Atlanta of conspiracy to aid and abet terrorists — did little to refute prosecutors’ contentions that the two men planned to enlist with a terrorist organization abroad and launch attacks against strategic government installations and other sites in the United States.