A jury was seated Wednesday for the trial of an ex-cop accused of firing a pepper spray gun so close to a Beaumont woman's face that it permanently blinded her.

Enoch Clark, 38, could face more than 20 years in prison if convicted of the disabling assault on 32-year-old Monique Hernandez on Feb. 21, 2012. After two days of screening prospects, Riverside County Superior Court Judge Mac Fisher swore in a panel to hear evidence in the trial, which is expected to last several weeks. Opening statements are scheduled for 9 a.m. Thursday.

Clark was indicted in April 2012 on charges of assault resulting in great bodily injury, assault by a peace officer, assault with a non-lethal weapon and unnecessary force causing injury, with allegations of using a weapon during a felony and producing great bodily injury in the course of a crime. He is free on $50,000 bail. According to the District Attorney's Office, sheriff's detectives determined that Clark had fired his JPX pepper gun -- which resembles a Star Trek Phaser and ejects propellant at 400 mph -- 10 inches from Hernandez's face in the process of trying to arrest her, damaging both her eyes. The recommended range to fire a JPX device is six to 16 feet from a target.

Prosecutors said the lawman had been trained in the proper use of the weapon. Los Angeles-based civil attorney Milton Grimes is representing the injured woman and her family in a civil suit filed in federal court.

"There was no justification for using such gross and excessive force," Grimes said.

U.S. District Judge Harry Pregerson in Los Angeles is presiding over that case, which is still in discovery.

On the day of the alleged assault, Hernandez had driven her younger sister to pick up the woman's 2-year-old daughter, who was visiting her biological father, according to court papers. During the ensuing child custody exchange, Hernandez's sister and ex- boyfriend got into an argument, resulting in the latter grabbing the woman, at which point Hernandez intervened and scuffled with the man, prompting his mother to call the police.