Eric Jamal Johnson, 20, is charged with murder

By Tara Fowler and Harriet Sokmensuer
Updated January 08, 2016 06:00 PM
Denton Police Department

The former Marine accused of shooting a a University of North Texas student has allegedly confessed to killing her, PEOPLE confirms.

Eric Jamal Johnson, 20, is charged with murder in the shooting death of Sara Mutschlechner, who was driving back with friends from a New Year’s party when Johnson allegedly shot her.

Johnson allegedly admitted to police that he fired at Mutschlechner’s vehicle on Dec. 31, according to a press release from the City of Denton, which was obtained by PEOPLE. He also allegedly apologized for shooting her.

“Eric is being held in the Yuma County Detention Center,” reads the release. “Eric agreed to speak with the investigators and has cooperated with the investigation, admitting his responsibility in the shooting.

“During his interview, Eric did request that we express his sympathy to Sara s family and her sorority sisters,” the release adds.

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The shooting came after an alleged dispute with Johnson at a red light.

According to authorities, a vehicle Johnson was in stopped next to the vehicle Mutschlechner was in. The passengers of the two vehicles began talking while waiting for the light to turn green when Johnson and his friends allegedly became vulgar.

Passengers of Johnson’s vehicle allegedly made sexual comments to Mutschlechner and the other people in her car.

When Mutschlechner and her friends told Johnson and his friends that the comments were rude, one of Johnson’s passengers allegedly told one of Mutschlechner’s friends he would “beat [him up].”

Mutschlechner was shot in the head during the dispute and died later at a local hospital.

Johnson was arrested for her murder in Arizona on Jan. 5. He was dismissed from the Marines Corps a day later. The investigation is ongoing, but Johnson is expected to be extradited to Texas in the next 10 days. He has a court-appointed attorney and has not yet entered a plea.

A GoFundMe page has been created to help pay for Mutschlechner’s funeral and medical bills.