Evidence Submission, Property Room Procedures, and Lab Intake

Why Property-Room Procedures Matter

Every item collected at a crime scene must eventually reach a secure storage facility—the property room—and, in many cases, an outside forensic laboratory. How that transfer happens is just as important as how the evidence was collected. Courts scrutinize the chain of custody from the moment an item is seized to the moment it is presented at trial. A gap, an unsigned form, or an undocumented transfer can give the defense grounds to challenge admissibility. Solid property-room procedures close those gaps.

The Intake Process

When you arrive at the property room, you are the submitting officer. The property-room officer (PRO) is an independent gatekeeper whose job is to verify what you bring before accepting it. The standard intake sequence works like this:

1. Identify yourself and the case. State your name, badge number or employee ID, the case number, and the date and location of the scene.

2. Present packaged items. Every item must already be sealed and labeled before you arrive. Do not open or re-seal packaging at the property-room counter.

3. Verbally confirm each item. Read each item number aloud—description, quantity, and condition—while the PRO checks it against your evidence log. Both parties confirm agreement before moving to the next item.

4. Complete the intake form. Standard fields typically include: case number, submitting officer, date/time of submission, item count, item descriptions, packaging condition, seal integrity notation, and the PRO's signature.

5. Obtain a receipt. The PRO issues a signed receipt listing every accepted item. File one copy in the case folder immediately; the PRO retains the original for the property-room log.

If any package shows signs of tampering—broken seals, leaking, missing labels—stop. Document the discrepancy in writing and notify a supervisor before the item is accepted or rejected.

Locker Assignment and Storage Organization

Property rooms organize evidence by case number, not by item type, so that all items from one investigation stay together and can be retrieved quickly. The PRO assigns a locker, shelf, or bin and records that location on the storage log. Large items may go to a secured evidence bay; firearms to a dedicated armory cabinet; currency to a vault.

Refrigerated and frozen storage for biologicals is a critical subcategory. Blood, tissue, swabs, and other biological materials degrade at room temperature. Standard practice requires:

• Refrigeration (approximately 2–8 °C): short-term storage of biological items such as swabs, blood-stained clothing already dry, and reference samples.
• Freezing (at or below −20 °C): long-term preservation of biological specimens, sexual-assault evidence kits, and items awaiting DNA analysis.
• A dedicated biological refrigerator/freezer must be used exclusively for evidence—never shared with food or reagents—and temperature logs must be checked and initialed daily.

All biological items must be completely dry before sealing in paper packaging; plastic traps moisture and promotes mold and bacterial growth, which degrades DNA.

Check-Out and Temporary Evidence Release

Evidence sometimes must leave the property room before trial—most often to travel to an outside forensic laboratory. This creates an additional link in the chain of custody that must be documented precisely.

A temporary-evidence-release form captures:

• The case number and item numbers being released
• The name and agency of the receiving party (e.g., the laboratory analyst)
• The purpose of the release (e.g., DNA analysis, toxicology screening)
• The date and time of release
• Signatures of both the PRO releasing the item and the courier or analyst receiving it
• The expected return date

When the item comes back, a return receipt is generated, re-logged, and re-assigned to storage. Every transfer out and back is a new chain-of-custody link. Missing a signature on any one of these links has been used in real cases to argue that evidence was contaminated, substituted, or tampered with between collection and trial.

Case Folder Documentation

The case folder is the paper spine of the investigation. Every receipt, log entry, and release form gets a copy in the folder. When a prosecutor prepares for trial, this folder must show an unbroken, timestamped record of who had each item, where it was stored, and why it moved. Organize documents chronologically and never remove originals—only certified copies leave the folder.

Safety in the Property Room

• PPE is mandatory when handling biological evidence: nitrile gloves at minimum; a face shield and gown if packaging is damaged or leaking.
• Sharps protocols: Never reach blindly into a bag that may contain needles. Open packages on a flat surface with scissors; never tear.
• Hazardous materials: If an item is suspected to contain controlled substances in bulk, flammable liquids, or unknown powders, do not handle it at an open counter. Follow your agency's hazmat protocols and notify the supervisor.
• Cross-contamination prevention: Handle only one item at a time; change gloves between items when biological material is involved.
• No food or drink in the property room or biological storage areas.

Common Failure Points

Property-room errors that recur in case law and audit reports include: submitting wet biological evidence in plastic (causes mold, degrades DNA); failing to obtain or file the PRO receipt; releasing evidence to an outside lab without a signed release form; and incorrect case-number notation that places items in the wrong case file. Verify every field on every form before you leave the counter.