DENTON (CBSDFW.COM/AP) – A man whose 50-year prison sentence over the 2007 slaying of his ex-girlfriend in Denton was overturned must now serve nearly twice as long.

The Denton Record-Chronicle reported Wednesday that the new prison term for 27-year-old Sean Kresse is 99 years.

The case involves the 2007 strangulation of 21-year-old Lorena “Lori” Sandoval. The University of North Texas senior from El Paso had broken up with Kresse.

Authorities found the body of Sandoval in her Denton apartment after responding to a 911 call from Kresse’s mother. Police said Kresse had called his mother in Fort Worth for help, and she attempted CPR on Sandoval before calling police.

Sandoval, who grew up in El Paso, was a business entrepreneur major and was just a few months away from graduation.

Kresse in 2009 pleaded guilty to murder and was sentenced, by a jury, to 50 years in prison.

The defense appealed over the judge’s rulings on witnesses and evidence. An appeals court in April overturned Kresse’s prison term and ordered a new sentencing phase.

A different jury on Friday ordered the 99-year prison term for Kresse. His attorney did not immediately comment.

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EDITOR’S NOTE: “Graduation” was misspelled in the fifth paragraph. It has since been corrected.