Each investigation and adjudication process is individualized, but a basic outline can be found here.
During the filing of a police report, you may choose to discontinue interaction with the police and refrain from pursuing an investigation at any time. If you choose to pursue an investigation, the police will collect evidence and encourage you to complete a sexual assault exam (at no cost to you) if you have not already done so. Additionally, you may request a court order of protection. The office of the district attorney for the area will evaluate the results of the investigation to determine the continuation of criminal proceedings.
Note: You may pursue adjudication via the criminal justice system, the university process with the Office of Equal Opportunity and Affirmative Action or both simultaneously. University police will share reports of sexual misconduct with the Office of Equal Opportunity and Affirmative Action.