PETOSKEY, MI - A man is accused of stabbing a tribal police officer with a pen after he and his wife were denied re-entry to a casino because she urinated on herself, the FBI says.

Aaron Martin Vorac, 37, is accused of assaulting a federal police officer. He is named in a criminal complaint pending possible indictment by a federal grand jury.

He is accused of punching and stabbing George Closser, a tribal police officer for the Little Traverse Band of Odawa Indians, before security officers for Odawa Casino Resort helped subdue the suspect, FBI special agent R. Scott Ray wrote in the complaint.

Casino video captured the incident.

"The video appeared to show Vorac punching Officer Closser in the groin several times and then stabbing the officer in the chest and face with what is believed to be a pen," Ray wrote.

The trouble started around 4:30 p.m. on Jan. 15 at the craps table. Vorac's wife urinated on herself and was cut off from alcohol, the FBI said.

Vorac and his wife left the casino. Workers thought the couple left the casino property.

The couple returned a short time later. They were told they could not enter. The wife drove around the casino, returned to the front entrance and tried to get in again.

Casino security call tribal police.

Closser approached the couple and asked for identification. Vorac said he and his wife were just leaving. Closser said Vorac could not leave because of a complaint he was possibly intoxicated.

Vorac got out of the vehicle and approached the officer, police said. Closser put his hand out to keep Vorac from getting too close. Vorac walked into his hand three times, Ray wrote in his complaint.

Vorac allegedly said he was formerly in the military and wanted to leave.

"Vorac made a statement indicating there was going to be a problem and that he was not going to be arrested for something he did not do," Ray wrote.

After Vorac approached Closser again, the officer decided to arrest him. He extended his baton but was unable to strike Vorac because his wife was in the way. Both of the men then fell to the ground during the altercation.

Vorac was on top of the officer when the officer told casino security to call 911.

"Vorac grabbed an object and was heard saying, 'I'm going to stab you with a pen,'" Ray wrote.

The officer recalled feeling contact and seeing blood, the FBI agent said. Casino security helped the officer.

Vorac is free on a $25,000 unsecured bond. His attorney declined to comment.

The Bureau of Indian Affairs issues special law-enforcement commissions to tribal police officers to assist in enforcing federal laws applicable to Indian Country.