A police report is a document detailing a crime or incidence. In most cases, a victim or witness of a crime advises local police, who generate a report to start an investigation.
Accroding to the UCLA website, thefts, burglaries and assaults are examples of crimes reported to a local police precinct, and they can be the first step in arresting a perpetrator. Furthermore, reporting criminal activity allows the victim of a crime to have a legal document to use as evidence for court hearings and insurance claims. Police reports also help communities by tracking criminal activity trends, thereby deterring future criminal activity. Usually, police reports are taken in a local precinct, however online reporting for non-emergency crimes is possible in many jurisdictions.