FORT HOOD, Texas (AP) — Army Maj. Nidal Hasan could begin presenting his defense tomorrow at his trial for the 2009 shooting rampage at Fort Hood in Texas that killed 13 people.

But it's still not clear whether he will choose to mount a defense. He's acting as his own attorney, but he questioned only three of the prosecution's witnesses, and he has raised few objections.

Today, he signaled that he may call no witnesses. He said he no longer plans to call a professor of psychology and religion at San Francisco Theological Seminary. The professor was the last of two witnesses Hasan had initially said might testify. He still has the option of taking the witness stand in his own defense.

The prosecution called nearly 90 witnesses in 11 days.

Hasan, an American-born Muslim, began the trial by telling jurors that he was the gunman. And he has leaked documents during the trial seeking to justify the shootings as a defense of his faith.