She also said Lauren had blocked Rowland's phone number, as well as the number of his friends, after reporting harassment to university police.
McCluskey's mother, Jill, told the station she was on the phone with her daughter when the attack started.
Her body was found inside a auto, The Salt Lake Tribune reported.
McCluskey's husband then called police before a young woman picked up the phone and told her that Lauren's belongings were scattered on the ground, Jill McCluskey said. The prime suspect was her ex-boyfriend of one month, Melvin S. Rowland, although the police claimed it was he who "shot and killed" Lauren, according to The Salt Lake Tribune.
Additionally, University of Utah Police Services Lt. Brian Wahlin said that authorities chased Rowland to his location, where they found that he had broken into a church. Days later, she told university police he had begun harassing her.
According to the school's statement, the shooting took place at about 8:20 p.m. Campus police responded to a call of a possible abduction at that time and found McCluskey's body in a parked vehicle outside a dorm.
The suspect and the student had "a previous relationship", he said.
Shortly before 9 p.m. Monday, McCluskey said, she was on the phone with her daughter, who was going back to her apartment after her night class.
"Lauren was informed by a friend about his criminal history, and she ended the relationship with her killer on October 9, 2018", the statement said.
McCluskey had a 3.75 grade point average and was on track to graduate in May 2019.
Student-athletes and other campus personnel at BYU, Utah Valley University, Utah State and Weber State wore red clothing Wednesday as a show of support.
In January 2018, Rowland went before the parole board for the first time in two years stating that he had completed sex offender treatment again.
She signed her letter of intent to attend the University of Utah in November 2014.
The only mention of any possible violent behaviour came during a 2016 hearing when an officer mentioned that Rowland had said he might become violent if he received another visit from a parole officer.
The statement said Lauren dated her alleged killer for about a month.
Rowland spent almost a decade in prison after pleading guilty in 2004 to trying to lure an underage girl online and attempted sex abuse charges, according to court records.
"This news has shaken not only myself but our entire University of Utah athletics family to its core", said university director of athletics Mark Harlan in a Tuesday morning statement. He was found dead with from a self-suspected gunshot wound about 4 miles from campus. He was last seen on foot leaving north from the university's medical towers.
The University of Utah has been sharing updates with students through a campus alert website.
The events occurred a year after a fatal shooting near campus shook the state's flagship university. Police responded and as they searched the area, they discovered Lauren deceased in a parked auto near the south tower of the Medical Plaza, a residential hall on campus. He and his wife were charged with hatching a carjacking plot that led to the October 2017 death of 23-year-old Chenwei Guo.
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