A Las Vegas great-grandmother pleaded no-contest Thursday to misdemeanor battery for attacking a man in a courthouse hallway outside a pretrial hearing on charges that he struck and killed her son with a vehicle.

Lindona Thompson, 64, didn't appear in Las Vegas Justice Court while attorney Michael Schwarz entered the plea on her behalf in the Nov. 5 scuffle.

Justice of the Peace Melissa Saragosa fined Thompson $100 and ordered her to attend impulse control classes and stay out of trouble for 90 days. The judge set a March 31 date to dismiss the charge if Thompson complies.

Thompson previously acknowledged throwing punches at Gary Richard Adair Jr. at the Regional Justice Center in Las Vegas.

Adair is due for trial March 28 after pleading not guilty to felony reckless driving and driving under the influence of drugs in the March 2014 crash that killed Kadar Brown on U.S. 95 in Las Vegas.

Brown, 38, was outside his vehicle, changing a flat tire at the time.

Adair is free on bail. He could face decades in prison if he's convicted.

Thompson, who became a great-grandmother in September, acknowledged at the time that she hit Adair when she encountered him in the hallway. She said she was frustrated by delays in his trial.