THE PROSECUTION
The prosecution represents "the people" - in Oregon they are referred to as District Attorneys, or Assistant United States Attorneys. The prosecutor's job is to prosecute crimes for their jurisdiction (such as the city, county, or even for federal crimes); their job is also to "seek justice," but that is a task many either forget, or view very differently than the defense bar.

Prosecutors will review the police reports, and often speak with complaining witnesses (whom they will refer to as victims), witnesses, and forensic experts. In doing so, they will evaluate:

1) whether a case should be brought (cases where they determine no crime was committed, or where it is apparent prosecution will be impossible are 'no complainted')

2) what charges are appropriate under the facts of the case

3) what their position will be on the release status of the defendant: do they feel the defendant should be in jail pending trial, or are there release conditions which will "ensure the safety of the public and the victim, the defendant's court appearance and that the defendant does not engage in domestic violence while on release."

4) whether to schedule a grand jury to hear the case

You need a trained professional assessing the case for you as well.