A 25-year-old man pleaded guilty Monday to two counts of first-degree sexual abuse in a September attack on a 17-year old girl as she was walking home from night school.

Prosecutors said Donald Davis, of no fixed address, pled guilty in D.C. Superior Court to the Sept. 20, which took place as the victim was walking home on Alabama Avenue SE. Davis abruptly pled guilty in the middle of his trial.

Davis came up behind the victim, pushed a hard object in her back and threatened to kill her if she did not comply with his demands, authorities said. He then forced her to the back of an abandoned house in an alley and raped her “numerous times,” according to prosecutors.

Later, after Davis escorted the victim out of the alley, the victim saw family members who were looking for her, according to court documents. The victim screamed for help and told her family what Davis had done, and family members held Davis until police came.

Davis is scheduled to be sentenced Sept. 9 by Judge Thomas J. Motley. Davis faces a maximum of 60 years in prison and will be required to register as a sex offender.