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David Desper admits to gunning down 18-year-old Bianca Roberson during a road rage incident in West Goshen Township.
David Desper faces up to 45 years in prison when he is sentenced on Dec. 13.
Roberson, of West Chester, died on June 28, 2017 while out on a shopping trip one week before leaving for her freshman year of college.
A sentencing date has been set for a Delaware County, Pennsylvania, man who pleaded guilty to third-degree murder in the shooting death of a recent high school graduate during a road rage confrontation.
Police say Desper and 18-year-old Bianca Roberson jockeyed for space in the merger of a highway lane in West Goshen Township before Desper pulled out a gun and shot Roberson in the head in 2017.
Desper turned himself in four days later.
His plea came a week before his trial was set to begin. He was originally charged with first-degree murder, criminal homicide, possession of an instrument of crime and reckless endangerment.