A system for the tagging, organization and tracking of evidence during the course of an investigation. The system generally utilizes an onsite handheld mobile computer device which is capable of taking input information including a description of evidence and a photo of evidence, reading a machine readable tag placed on the evidence, and printing an evidence bag label for identification the storage into which the evidence is placed. The handheld device can store this information in onboard memory until it is uploaded to a central server computer.