Penal Code § 4574 addresses knowingly bringing, sending or assisting in bringing or sending certain weapons into a California jail or prison setting. For a visitor or sender, the decision is whether the alleged item and entry location fit the statute, what the person knew, and whether law or an empowered institutional official authorized the act. A package, car or visitor-search report should be compared with the actual filed subdivision before assuming a felony.
Identify the item, route and alleged actor
Section 4574(a) covers firearms, deadly weapons and explosives brought or sent into listed prisons, camps and jails, or onto grounds belonging or adjacent to them, including knowing assistance. The excerpt “knowingly brings or sends into” identifies an act and a knowledge requirement. The provision begins with exceptions for conduct otherwise authorized by law or by the person in charge of the institution or an officer empowered to authorize it. An ordinary claim that a visitor meant no harm is not the same as authorization; preserve any written permission, directions, appointment or facility communication for counsel to assess.
CALCRIM No. 2747 (2026) separates the alleged act of introduction or assistance from knowledge that the object was being brought or sent to the institution or its grounds, and knowledge of the item’s character. The instruction defines a deadly weapon in this setting by its reasonable potential for causing great bodily injury or death. It says the prosecution need not prove an intent to use the object as a weapon. If authorization is supported by the evidence, the instruction places the burden on the People to prove the conduct was not authorized beyond a reasonable doubt.
Record where the item was discovered: in a visitor’s belongings, a package, a vehicle, a screening point or inside the facility. Preserve the search and property records, package chain, messages from the person who supplied an item, and any available entry or delivery video. Those facts can affect whether a particular person brought, sent or assisted in introduction and what that person knew. Being near another person’s bag or delivery does not by itself settle a knowing-assistance allegation.
Tear gas has separate branches
Section 4574 treats tear gas and tear-gas weapons differently from a generic firearm or explosive allegation. Outside the conduct covered by subdivision (a), subdivision (b) makes knowing introduction a felony when it results in release of the gas or use of the weapon. Subdivision (c) treats knowing introduction without that additional result as a misdemeanor, with up to six months in county jail or a fine up to $1,000, or both. Section 4574(a) also separately reaches a person lawfully confined in a jail or county road camp who possesses the specified items, including tear gas. Do not apply a visitor’s introduction analysis to that inmate-possession branch.
For the ordinary firearm, deadly-weapon or explosive branch in subdivision (a), and the release/use tear-gas branch in (b), the statute states a two-, three- or four-year felony term under § 1170(h). That range does not establish an individual’s sentence. Compare the charge, item classification, institution records and any authorization before discussing a plea or defense. A drug brought to a facility raises different statutes; § 4574 is a weapon and tear-gas provision.
Keep introduction separate from possession
Section 4502 addresses possessing or manufacturing listed weapons while at or in institutional custody. Section 4574’s visitor/sender inquiry centers on bringing, sending or assisting and its authorization question. A single episode could prompt more than one allegation, but the elements and proof cannot be swapped. Read the filed complaint and the facility’s contemporaneous records, not just a search summary.
Compare that possession or manufacturing allegation with the guide to Penal Code 4502 weapons in custody.
The Law Offices of David S. Chesley can review the visitor, delivery or facility record and the exact subsection through its criminal-defense practice. Contact the firm or call (800) 755-5174 to discuss the case.