HOUSTON (AP) — The defense lawyer for a Texas inmate executed two decades ago says he isn't convinced the state wrongly killed a man despite a new report that again questions the case.

Carlos DeLuna was convicted in the 1983 fatal stabbing of a Corpus Christi convenience store clerk.

A team headed by a Columbia University law professor recently published a 400-page report contending DeLuna wasn't the killer. It cites prosecutors' reliance on a single eyewitness to the attack and claims attorneys on both sides didn't fully investigate another suspect.

DeLuna's attorney, James Lawrence, said Wednesday his legal team "pounced" on evidence problems, including shaky eyewitness accounts and the fact that no blood found on DeLuna.

But he and the former prosecutor noted DeLuna never identified the man he claimed was the killer.