Letter X — Terminology FAQ
Common questions about terms starting with XHow does X-ray screening work at a prison entry point?
At a correctional facility entry point, all bags, packages, and property pass through an X-ray conveyor belt scanner. Walk-through metal detectors screen persons. If the X-ray shows a suspicious object or the metal detector triggers, a targeted hand search or additional scanning is conducted. Newer facilities use millimeter wave body scanners that can detect non-metallic contraband including plastic-wrapped drugs. All vehicles entering may be scanned with under-vehicle imaging systems or inspected with mirrors.
Can a prison read my attorney's letters to my incarcerated family member?
No. Legal mail from an attorney is constitutionally protected -- it can be scanned by X-ray for physical contraband, and can be opened in the inmate's presence to check for physical items, but staff cannot read the contents. The attorney-client privilege survives incarceration. If mail is marked "legal mail" and the return address is a licensed attorney or law firm, it must be handled according to legal mail procedures. Unlawful reading of legal mail can support a civil rights claim.
What items are typically prohibited as excess or contraband in prison?
Prohibited items vary by facility but generally include: cash (inmates use trust accounts), cell phones, weapons of any kind, drugs and drug paraphernalia, alcohol or alcohol-making materials, excessive clothing or food beyond limits, unauthorized electronics, and sexually explicit material beyond what is permitted. Legal property limits specify exactly how many of each approved item an inmate can possess. Items found during cell searches that exceed limits or are prohibited entirely result in disciplinary action and confiscation.
What is ion mobility spectrometry and how is it used in prisons?
Ion mobility spectrometry (IMS) devices -- sometimes called trace detectors -- can detect microscopic residue of drugs and explosives on surfaces, skin, and clothing. Correctional facilities use IMS devices to swab visitors' hands, bags, and mail to detect drug residue. A positive result triggers additional screening and may result in denial of the visit. IMS is highly sensitive and can detect residue from indirect contact, which sometimes results in false positives for visitors who have been in proximity to drugs.
Know the Terms. Understand the System.
The JailGuide prison survival guide explains what these terms mean in practice — how searches actually happen, what a lockdown looks like day to day, and what families need to know to stay connected. Written from direct federal experience.
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