Supplemental report

A supplemental report is an additional document or entry that adds information to an existing incident or investigation. It may record follow-up interviews, newly available evidence, corrected details, or another case-related action. It usually needs to be read with the original report. Its existence does not necessarily mean a new incident occurred or the original report was wrong.

How the case record develops

An initial report captures information available at one stage. Follow-up work can produce details that were unavailable then. Keeping those developments in a supplemental report preserves a sequence rather than making every later fact appear to have been known from the beginning.

VCU Police's investigations policy requires case-related activities to be chronologically documented through supplemental reports. Seattle's online-reporting guidance likewise allows a person to add information to an existing report rather than submitting the same matter again. These are two different reporting workflows using the same underlying idea. VCU policy, Seattle reporting guidance

The author can differ from the author of the original report. A resident's submitted supplement, an officer's narrative, and an investigator's follow-up document should not be treated as equivalent evidence without reading their attribution.

Example

Hypothetical example: An initial report describes a stolen camera but lacks its serial number. The owner finds the purchase receipt a week later and submits the serial number. An officer adds a supplemental report connecting the new information to the original case number.

There is one reported theft and an additional document in this example. Counting every report document as a separate theft would double-count the matter. The new serial number also does not prove that police have found the camera or identified who took it.

Common confusion

A correction fixes an inaccurate detail. A supplement can add a detail that was previously unknown without correcting anything. The agency's procedures determine how each is documented.

A supplement is also different from a separate case linked to the first. Related events can receive distinct identifiers. A shared person or location alone does not establish whether the documents belong to one case.

Reading the complete sequence

Check the parent case number, document date, event date, author, and information source. A public release containing only the initial report may omit later qualifications. Conversely, a supplement may assume background supplied in the first report. For analysis, distinguish documents from cases and establish whether amended information replaces or merely accompanies the earlier value in an exported dataset.

Related terms

• Incident report
• Case number
• Open investigation
• Police report

Sources

• VCU Police — 7-2 Criminal Investigations, “Supplemental Reports Procedure”: chronological case-related documentation.
• Seattle Police — Online Crime Reporting: additions tied to an existing report number.