Idaho’s criminal laws, penalties, and defenses sit primarily in Title 18 of the Idaho Code, which sorts every offense into one of three tiers and attaches penalties that run from a $300 civil fine to the death penalty. The state recognizes self-defense broadly, entrapment in narrow circumstances, and no insanity defense at all. What follows walks through how charges are classified, what specific offenses carry, how long prosecutors have to file, what defenses the law allows, and what relief may be available after a conviction.
The Three Tiers of Idaho Offenses
Under Idaho Code 18-111, a felony is any crime punishable by death or imprisonment in the state prison. An infraction is a civil public offense capped at $300 with no jail time. Everything in between is a misdemeanor.1Idaho State Legislature. Idaho Code 18-111 – Felony, Misdemeanor and Infraction Defined
One rule inside that statute changes real outcomes. When a crime can be punished as either a felony or a misdemeanor at the judge’s discretion, it becomes a misdemeanor for all purposes the moment the court imposes a non-prison sentence. A charge that started life as a potential felony ends up on the record as a misdemeanor if the judge sentences you to county jail or a fine.1Idaho State Legislature. Idaho Code 18-111 – Felony, Misdemeanor and Infraction Defined
Major Offenses and What They Carry
Murder and Homicide
Idaho defines murder as the unlawful killing of a human being with malice aforethought, or a killing caused by intentional torture. The statute explicitly includes a human embryo or fetus.2Idaho State Legislature. Idaho Code 18-4001 – Murder Defined
First-degree murder covers killings by poison, lying in wait, torture, or any willful and premeditated act. It also includes the killing of a peace officer, firefighter, judge, or prosecutor acting in an official capacity, and any murder committed during arson, robbery, rape, burglary, or kidnapping. All other murders are second-degree.3Idaho State Legislature. Idaho Code 18-4003 – Degrees of Murder
First-degree murder is death-penalty eligible, with life imprisonment (with or without parole) as the alternative. Second-degree murder carries a fixed prison term set by the court.
Burglary and Property Damage
Burglary in Idaho means entering any building, vehicle, or structure with the intent to commit theft or any felony inside. Nothing has to be stolen and the intended felony never has to occur. The crime is complete the instant you enter with that intent.4Idaho State Legislature. Idaho Code 18-1401 – Burglary Defined
Malicious injury to property under Idaho Code 18-7001 is a misdemeanor when someone intentionally damages another person’s property, punishable by up to one year in county jail, a fine up to $1,000, or both. Damage over $1,000 makes it a felony, carrying one to five years in state prison.5Idaho State Legislature. Idaho Code 18-7001 – Malicious Injury to Property
Criminal trespass under Idaho Code 18-7008 is separate. Entering or remaining on someone else’s property without permission, when you know or should know your presence is unwelcome, is generally a misdemeanor, though certain aggravated forms carry stiffer penalties.6Idaho State Legislature. Idaho Code 18-7008 – Criminal Trespass – Definitions and Acts Constituting
Drug Possession
Whether a possession charge is a felony or misdemeanor turns on the drug’s scheduling, not the amount, with marijuana as the exception. The core penalties under Idaho Code 37-2732:
- Schedule I narcotics or Schedule II substances: felony, up to seven years and a fine up to $15,000.
- LSD: felony, up to three years and a fine up to $5,000.
- Non-narcotic Schedule I drugs (except LSD), or Schedule III through VI substances: misdemeanor, up to one year in jail and a fine up to $1,000.
- Marijuana over three ounces: felony, up to five years and a fine up to $10,000.
- Marijuana three ounces or less: misdemeanor, with a mandatory minimum $300 fine for anyone 18 or older on top of the standard penalties.
These figures apply to simple possession. Manufacture, delivery, or sale triggers harsher penalties in other subsections of the same statute.7Idaho State Legislature. Idaho Code 37-2732 – Prohibited Acts A – Penalties
DUI
Driving under the influence means operating a vehicle with a blood alcohol concentration of 0.08% or higher, or while impaired by alcohol, drugs, or other intoxicants. For drivers under 21, the threshold is 0.02%.8Idaho State Legislature. Idaho Code 18-8004 – Driving Under the Influence
A first DUI is a misdemeanor carrying up to six months in jail and a fine up to $1,000. The license consequences layer on top: a mandatory 30-day absolute suspension with no driving privileges of any kind, followed by another 60 to 150 days during which the court may grant a restricted license for work or family health needs. An ignition interlock device is then required on every vehicle you operate for one year after the suspension ends, installed at your expense. Repeat offenses and cases involving very high BAC levels escalate quickly, including into felony territory.9Idaho State Legislature. Idaho Code 18-8005 – Penalties
How Sentencing Works
The default misdemeanor sentence is up to six months in county jail, a fine up to $1,000, or both. Many misdemeanor statutes set their own penalties, higher or lower. If the specific statute already includes a fine, the court cannot stack an additional $1,000 fine on top.10Idaho State Legislature. Idaho Code 18-113 – Punishment for Misdemeanor Judges can impose probation instead of jail, with conditions such as community service, counseling, or treatment.
Felony sentences vary by offense. Some statutes set a fixed range (malicious property damage over $1,000 is one to five years, for instance); others leave the range open. When the statute gives a range, the judge sets the specific term within it based on the circumstances.11Idaho State Legislature. Idaho Code 18-107 – Determination of Punishment by Court
The Persistent Violator Enhancement
A third felony conviction, counting priors from any jurisdiction, triggers Idaho’s persistent violator law. The mandatory minimum is five years in state prison, with a potential sentence up to life. The court cannot go below five years once that status is established, and prosecutors regularly use the threat of the enhancement in plea negotiations.12Idaho State Legislature. Idaho Code 19-2514 – Persistent Violator – Sentence on Third Conviction for Felony
Civil Rights After a Felony
A felony sentence suspends all civil rights while you are imprisoned, and forfeits any public office or position of trust. On parole or probation, most civil rights return except political rights like voting and the right to possess firearms. Final discharge from the entire sentence, including probation and parole, restores full citizenship. The firearm exception: people convicted of treason or certain enumerated serious offenses never regain firearm rights, even after completing their sentences.13Idaho State Legislature. Idaho Code 18-310 – Imprisonment – Effect on Civil Rights and Offices
Deadlines to File Charges
Some offenses have no filing deadline at all. Prosecutors can bring charges for murder, voluntary manslaughter, rape, sexual abuse of a child, lewd conduct with a child, and acts of terrorism at any time.14Idaho State Legislature. Idaho Code 19-401 – No Statute of Limitations for Certain Felonies
Other felonies must be charged within five years of the crime.15Idaho State Legislature. Idaho Code 19-402 – Commencement of Prosecution Most misdemeanors carry a one-year deadline.16Idaho State Legislature. Idaho Code 19-403 – Misdemeanor Statute of Limitations The clock pauses (tolls) when a suspect leaves the state or is otherwise unavailable, and it does not start at all for certain offenses like ritualized abuse of a child until the crime is reported.
Defenses Idaho Recognizes
Self-Defense and Stand Your Ground
Under Idaho Code 19-202A, no one faces legal jeopardy for protecting themselves or their family by reasonable means when they reasonably believe they are in imminent danger of a serious crime like robbery, rape, murder, or aggravated assault. Idaho is a stand-your-ground state: there is no duty to retreat from any place you have a legal right to be, and force is measured by what a reasonable person in the same situation would consider necessary, without the benefit of hindsight. Incarcerated individuals cannot invoke this right against jail or prison staff acting in their official capacity.17Idaho State Legislature. Idaho Code 19-202A – Defense of Self, Others and Certain Places
Entrapment
Entrapment applies when the government induces someone to commit a crime they would not otherwise have committed. The line runs between planting the idea and pushing the defendant into it, versus simply providing an opportunity to commit a crime the defendant was already willing to commit. Undercover drug buys rarely qualify, because the officer is usually just offering an opportunity rather than overcoming resistance.
No Insanity Defense
Idaho is one of a small number of states that has abolished the insanity defense outright. Under Idaho Code 18-207, mental condition is not a defense to any criminal charge. You cannot be acquitted because a mental illness prevented you from understanding your actions or knowing right from wrong. Mental health can still bear on whether the defendant had the specific intent an offense requires, and a defendant found after conviction to need treatment is placed in an appropriate facility during incarceration, with credit for time served.
Reducing or Dismissing a Conviction
Idaho has no formal expungement process that erases a criminal record. What it offers instead runs through Idaho Code 19-2604. If you received a suspended sentence or a withheld judgment, you can apply to the court after successfully completing probation. The court can set aside the guilty plea or conviction and dismiss the case if it finds good cause and no reason to continue probation. You generally need to show you did not violate probation terms, or that you successfully completed a drug court or mental health court program. A dismissal under this statute restores your civil rights.18Idaho State Legislature. Idaho Code 19-2604 – Discharge of Defendant – Amendment of Judgment
A separate provision lets you apply to reduce a felony to a misdemeanor after completing probation. If fewer than five years have passed since your discharge from probation, the prosecutor must agree. After five years, the court has more latitude to grant the reduction on its own for most offenses. Convictions for sex offenses that require registration can never be dismissed or reduced under this statute.18Idaho State Legislature. Idaho Code 19-2604 – Discharge of Defendant – Amendment of Judgment