MADISON, Wis. (AP) — A Wisconsin man defending himself against homicide charges for allegedly plowing his SUV through a Christmas parade stripped off his shirt, sat with his back to the camera and stuck a sign he’d been given to signal objections down his pants Thursday before opening statements began in his trial.

Prosecutors allege Darrell Brooks, 40, killed six people and injured scores of others on Nov. 21 in the Milwaukee suburb of Waukesha. Police said he turned into the parade after fleeing a domestic disturbance, though officers were not pursuing him at the time. The 76 charges he faces include six counts of first-degree intentional homicide. Each of those counts carries a mandatory life sentence.

Brooks has been acting as his own attorney since last week, when he demanded Judge Jennifer Dorow dismiss his public defenders. His trial began Monday with jury selection. Brooks repeatedly interrupted Dorow before prospective jurors were brought in, leading the judge to move him to another courtroom where he could watch via video and speak when she activated his microphone.

Opening statements were expected Thursday. Brooks began the day by interrupting Dorow at least a dozen times before jurors were brought into the courtroom. Among other things, he told her doesn’t recognize his own name.

Dorow had bailiffs take him to the alternate courtroom. Once there, he took off his jail uniform shirt and sat on the defense table with his back to the camera. He could been seen gesturing and jabbing the table with his finger. Dorow said that while bailiffs were trying to move him he took off his shoe and threatened to throw it.

He was given a sign to hold up to the camera to signal objections, which he stuck down the front of his pants. He also claimed he needed medical help for a cut on his fingers. Dorow said there was no blood and he would have to wait until the lunch break.

District Attorney Susan Opper told Dorow that she believes Brooks is simply trying to delay the trial. She said recordings of his calls from jail show he discusses his case with multiple people every day.

“These actions are deliberate and intentional and they have escalated,” Opper said. “He’s attempting to derail these proceedings and delay the inevitable.”

Dorow agreed, noting four psychologists have examined Brooks.

“It’s very clear to this court that everything that he has done as outlined by the state and made evident on the record of these proceedings that it is the sole intent of Mr. Brooks to make a mockery of this process,” Dorow said. “I believe this trial needs to continue and should continue.”

After Dorow called the jurors into the courtroom, Brooks removed his objection sign from his pants and stood behind the table with his eyes closed as Dorow read each charge.