ChainGrid PDA — Evidence Chain Desk
ChainGrid PDA is a field operations grid for police evidence chain of custody, offering unique IDs, QR labels, transfers, seals, and immutable audit history.
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About ChainGrid PDA — Evidence Chain Desk
ChainGrid PDA — Evidence Chain Desk is a specialized field operations grid designed for law enforcement agencies to manage the complete chain of custody for evidence. This single-file HTML application provides a secure, offline-capable platform for recording evidence intake, transfers, and releases, ensuring every step is documented with unique IDs, QR labels, authorized signatures, and timestamps. Built without AI, mock data, or sign-up requirements, it offers a streamlined, encrypted IndexedDB storage that guarantees data integrity and confidentiality. The app's immutable audit history creates a tamper-evident log, making it an essential tool for police officers, evidence custodians, and legal teams who require rigorous compliance with evidentiary procedures.
With ChainGrid PDA, officers can quickly log new evidence, assign it to specific storage zones, and manage transfers between facilities or personnel. The intuitive dispatch view provides a real-time overview of zone statuses, active crews, and recent chain records, enabling efficient resource allocation and situational awareness. The app supports QR label generation for physical evidence tags, ensuring accurate identification and reducing the risk of misplacement. Authorized signatures are captured digitally, and every action is recorded with a precise timestamp, creating a verifiable trail that meets legal standards. The integrated PDF chain-of-custody report generator allows users to produce professional, court-ready documentation with a single click, saving valuable time and reducing administrative burden.
Privacy and security are paramount in ChainGrid PDA. All data is stored locally in an encrypted IndexedDB, meaning sensitive evidence information never leaves the device, which is crucial for maintaining chain of custody integrity. The app operates entirely offline, making it ideal for use in remote locations or during field operations where internet connectivity is unreliable. There are no accounts, no cloud syncing, and no third-party services, ensuring that only authorized personnel with physical access to the device can view or modify data. This self-contained approach aligns with the highest standards of data protection and operational security required in law enforcement.
ChainGrid PDA is more than just a database; it is a comprehensive evidence management solution. Its user-friendly interface, combined with robust features like zone management, crew assignment, and incident tracking, empowers agencies to maintain meticulous records from the moment evidence is collected until it is released. The app's ability to generate detailed audit reports and export data in CSV, JSON, or PDF formats facilitates seamless integration with existing case management systems. Whether used in a precinct, at a crime scene, or in a storage facility, ChainGrid PDA enhances accountability, reduces errors, and ensures that the chain of custody is never broken.
Key features
- ✦ Unique Evidence IDs with customizable prefixes
- ✦ QR label generation for physical evidence tags
- ✦ Complete chain-of-custody logging with timestamps and signatures
- ✦ Storage zone management with real-time status
- ✦ Immutable audit history for tamper-evident records
- ✦ PDF chain-of-custody report generation
- ✦ Encrypted IndexedDB storage for data security
- ✦ Fully offline operation with no sign-up or external dependencies
Use cases
- → Logging evidence at crime scenes
- → Managing evidence storage in police facilities
- → Tracking evidence transfers between departments or labs
- → Generating court-ready chain-of-custody reports
- → Conducting internal audits of evidence handling procedures
- → Ensuring compliance with legal and regulatory standards
FAQ
Is ChainGrid PDA free to use?
Yes, ChainGrid PDA is a free, open-source application. It is distributed as a single HTML file that can be used without any licensing fees.
Does ChainGrid PDA require an internet connection?
No, ChainGrid PDA operates entirely offline. All data is stored locally on the device, ensuring privacy and reliability even in remote locations.
How is data stored in ChainGrid PDA?
Data is stored in an encrypted IndexedDB database within the browser. This ensures that all evidence records are secure and cannot be accessed by unauthorized parties.
Can I generate PDF reports for court?
Absolutely. ChainGrid PDA includes a built-in PDF report generator that creates professional chain-of-custody documents suitable for legal proceedings.
Is ChainGrid PDA suitable for large police departments?
Yes, ChainGrid PDA is scalable and can handle a large volume of evidence records. Its offline nature makes it ideal for distributed teams, and the data can be exported for central management.
How does ChainGrid PDA ensure the integrity of the audit trail?
The app uses an immutable audit history, meaning that once an action is recorded, it cannot be altered or deleted. This provides a tamper-evident log that meets legal standards.
Can I customize the evidence ID format?
Yes, the evidence ID format is customizable. You can set a prefix and numbering scheme that aligns with your agency's conventions.