A police officer is accused of killing a cheerleader who was about to graduate. He is no longer with the department

A former Minnesota state trooper suspected of being responsible for a car crash that killed an 18-year-old cheerleader is no longer employed by the Minnesota State Patrol, according to the agency.

Shane Roper, 32, faces multiple charges in connection with the May 18 accident that killed Olivia Flores and injured others.

As CNN previously reported, the former police officer pleaded not guilty in August to several charges, including second-degree manslaughter and negligent homicide.

A review of Roper's disciplinary record revealed that he had been involved in four previous accidents while driving his Minnesota State Patrol cruiser, “either due to inattentive driving or excessive speed,” the criminal complaint states.

According to Minnesota State Patrol Lt. Colonel Christina Bogojevic, Roper was placed on paid leave following the accident in May.

“Shane Roper's last day of work with the Department of Public Safety/Minnesota State Patrol was Tuesday, September 3,” Lt. Mike Lee told CNN on Saturday.

CNN has requested Roper's personnel records regarding disciplinary action to determine whether he was fired.

Family mourns their daughter

Olivia, captain of the Owatonna High School cheerleading team, was a beloved daughter, sister and teammate whose loss was widely felt in her community.

“She should have walked the stage,” Carlos Flores, Olivia's father, told KTTC. He wore a handmade bracelet with little beads that spelled out “LLO,” which stands for “Long Live Olivia.” “Because of you (Roper), we planned a funeral instead of her graduation.”

“Because of your decision, I am not allowed to dance with my daughter at her wedding.”

The Owatonna Huskies Cheerleaders hosted several events, including a dinner and silent auction, to honor their teammate and raise funds for the Flores family.

“It is with broken hearts that we say goodbye to our Olivia,” Owatonna Huskies Cheerleading said in a Facebook post. “She was such an amazing cheerleader, friend and person. She touched many lives and our lives will be forever changed because she brightened them.”

A GoFundMe campaign has been set up to help the Flores family cope with their loss.

CNN's Alaa Elassar And Sarah Schröder contributed to this story.

For more CNN news and newsletters, create an account at CNN.com