HELENA, Mont. -

A Montana county attorney's office will change the way it responds to reports of sexual assaults after a federal investigation into whether gender bias played a role in deciding whether to prosecute rape cases.

The agreement between the U.S. Department of Justice and the Missoula County Attorney's Office was announced Tuesday.

The investigation found evidence of gender bias and discrimination in the way county prosecutors handled sexual-assault complaints.

The agreement is the last piece in a probe that began two years before the May 1 disclosure that 55 colleges and universities nationwide are facing similar federal Title IX investigations.

The deal calls for training prosecutors, treating assault victims better, boosting investigation techniques and improving data tracking and communication.

The Montana attorney general's office will oversee the new standards and procedures.