Daniel Holtzclaw, a former Oklahoma City police officer accused of raping women while on duty, was found guilty on Thursday.

Mr. Holtzclaw was convicted on 18 of 36 counts of sexual assault in attacks on 13 women. Conviction on the charges comes with the possibility of a life sentence.

The former police officer worked the night shift on the northeast side of the city. In the trial, prosecutors said that from December 2013 to June 2014, Mr. Holtzclaw targeted women he stopped while on patrol, singling out poor, black victims with criminal backgrounds whose stories would not be believed.