Just over a year ago, a white man was accused of assaulting a black woman and calling her slurs.

Christopher Derby, 28, punched the younger woman in the face, knocking her to the ground late one night on the 1000 block of South Broadway, according to an affidavit filed in the case.

The incident started when Derby approached the woman and her friends and asked why “black people” were “causing so much trouble these days,” the affidavit stated. At the time, he was on parole for two felony convictions in Jefferson County, the Denver Post reported.

Derby reportedly bragged about the attack later, again using racist and sexist slurs, the affidavit stated. The woman needed stitches after the assault.

Today, Derby was sentenced to four years in prison for bias-motivated assault, the maximum allowed under his guilty plea. He apologized before the court.