Daniel Holtzclaw

Daniel Holtzclaw cries as the verdicts are read in his trial in Oklahoma City, Thursday, Dec. 10, 2015. Holtzclaw, a former Oklahoma City police officer, was facing dozens of charges alleging he sexually assaulted 13 women while on duty. Holtzclaw was found guilty on a number of counts.

(AP)

A former Eastern Michigan University football player was sentenced to 263 years in prison for rapes and assaults he committed while working as an Oklahoma City police officer, according to

a report by The Associated Press

.

Daniel Holtzclaw, 29, was found guilty on 18 sexual assault-related charges in December 2015, according to previous media reports. He was found not guilty of 18 other counts.

Holtzclaw's sentencing on Jan. 21 was delayed for several hours due to a request for a new trial from his defense attorney, the Associated Press reported. The request was ultimately denied.

Holtzclaw was accused of sexually assaulting multiple women while working as an on-duty police officer between February and June 2014.

Officials previously said many of the incidents, all involving black women, occurred during traffic stops during his 4 p.m. to 2 a.m. patrol shift in an isolated part of town.

The Oklahoma-native graduated with a degree in criminal justice from Eastern Michigan University in 2008. During his four years on the university's football team, Holtzclaw earned Freshman All-American honors and finished second on the all-time tackles list for the school.