A California Penal Code 148.4 allegation can concern either fire-protection equipment or a false fire alarm. The misdemeanor branches require conduct done “willfully and maliciously.” A separate felony branch applies to a false alarm when someone suffers great bodily injury or death as a result; it does not turn every equipment-tampering allegation into that felony. The exact act and what followed must be identified from the citation and evidence. (Penal Code § 148.4.)
Keep any citation, complaint or investigator contact and the appearance date. A school, workplace or apartment building may describe an incident as a “pulled alarm,” but that phrase alone does not establish who operated the system, why, whether the signal was false or which statutory branch is charged.
Separate equipment tampering from a false signal
Section 148.4(a)(1) covers willfully and maliciously tampering with, molesting, injuring or breaking fire-protection equipment, an installation, fire-alarm apparatus, a wire or a signal. The conduct may involve an alarm panel, detector or other protected component; counsel needs the actual item and alleged action rather than a general report of a malfunction. Maintenance work, accidental damage and a deliberate attempt to disable a system raise different factual questions. They do not automatically decide intent, but a complete repair and access record can clarify who did what.
Subdivision (a)(2) instead covers willfully and maliciously sending, giving, transmitting or sounding a false alarm of fire, using an alarm system or another method. The allegation might involve a manual pull station, electronic signal or communication; the statute is not limited to one device. Whether the person knew what they were sending, what they understood about a possible fire, and the exact transmission record matter. A mistaken good-faith report of smoke or danger is not the same allegation as a malicious false fire alarm, though the surrounding facts must be assessed.
Both (a) branches are misdemeanors punishable by up to one year in county jail, a fine of up to $1,000, or both under the section’s own text. Neither branch should be described as automatically a felony because responders arrived or an evacuation occurred.
The felony branch requires a resulting injury or death
Section 148.4(b) applies to willfully and maliciously sounding or communicating a false alarm of fire if a person sustains great bodily injury or death “as a result thereof.” The injury or death, its severity and its causal connection to the false alarm are additional questions. A large response, disruption or minor injury alone does not establish this subdivision. The statute authorizes imprisonment under Penal Code § 1170(h), a fine of $500 to $10,000, or both; counsel must examine the actual charge and sentencing law before describing exposure in a particular case.
This rule differs from Penal Code § 148.3, which addresses knowingly false reports of a broader class of emergencies to specified public agencies. Its felony branch has an additional knew-or-should-have-known response-likelihood condition. Neither statute is a substitute for the other’s fire-specific act and mental-state language. If both appear on a complaint, review each count rather than treating the labels as synonyms.
Preserve the sequence and the original records
Write down where you were, what you observed, who had access to the device, and whether you reported a condition you believed was real. Keep existing video, alarm-system logs, dispatch or maintenance records, work orders, messages and witness details without altering them. If an injury is alleged, the timing, medical record and responder chronology may matter. Access to agency or building records depends on the case; an incident number does not guarantee they will be released on request.
The firm’s discovery and evidence review guide explains how the records and recordings discussed here fit into case preparation.
Do not return to test an alarm, alter settings or ask others to agree on an account. The Law Offices of David S. Chesley can review the charged subsection, original records and any claimed injury in a criminal case. Contact the firm or call (800) 755-5174.