When a child is held in juvenile hall in California, a petition generally must be filed within 48 hours of arrest, not counting weekends and court holidays, and a judge must hold a detention hearing by the end of the next court day after that. The judge decides whether the child stays detained.

This guide walks through the detention stage of a California juvenile delinquency case in five steps, from the moment a probation officer decides whether to hold a child to what the court sets in motion afterward.

Before You Start: What to Know Before the Hearing

This page covers delinquency cases: a minor accused of breaking a law. Under Welf. & Inst. Code § 602, a minor between 12 and 17 years of age, inclusive, when he or she violates a state or federal law or a local ordinance defining a crime (other than an age-based curfew) is within the juvenile court's jurisdiction, subject to the adult-court transfer rules in § 707. A minor under 12 is within that jurisdiction only for certain listed offenses, including murder and specified forcible sex offenses. Child welfare cases, in which a parent is accused of abuse or neglect, are a separate process this page does not cover.

Juvenile court uses its own words. A petition is the document the district attorney or probation officer files saying a child did something that would be a crime for an adult; it is not a criminal complaint. The detention hearing decides whether the child stays in custody while the case goes on. The jurisdiction hearing (also called the adjudication hearing) decides whether the petition's allegations are true; that finding is not a conviction. Disposition is the court's order about what happens next; it is not a sentence. A ward of the court is a minor the court has placed under its supervision after a sustained petition. Probation is supervision with court-ordered conditions. Diversion is a program that can take the place of court. A transfer hearing decides whether a case moves to adult court. Sealing restricts access to the records.

The usual order is arrest, possible detention, the detention hearing, the jurisdiction hearing, then disposition. Under Welf. & Inst. Code § 633, at the detention hearing the minor and a parent or guardian who is present must first be told why the minor was taken into custody, the nature of the proceedings, and their right to be represented at every stage. The juvenile court process as a whole follows the same sequence.

Step 1: Arrest and the Decision to Detain

A probation officer who receives a minor in temporary custody must immediately investigate the circumstances and the facts of the arrest, under Welf. & Inst. Code § 628. The officer must immediately release the minor to a parent, legal guardian or responsible relative unless the evidence shows that staying in the home is contrary to the minor's welfare and at least one of these conditions exists: detention is a matter of immediate and urgent necessity to protect the minor, or reasonably necessary to protect the person or property of another; the minor is likely to flee the court's jurisdiction; or the minor has violated a juvenile court order.

Between full release and juvenile hall sits home supervision. Under Welf. & Inst. Code § 628.1, when a minor meets a detention condition but the probation officer believes 24-hour secure detention is not needed to protect anyone or to prevent flight, the officer proceeds under the home supervision provisions instead of holding the minor in a locked facility.

Parents are told what is happening. Under Welf. & Inst. Code § 627, an officer who takes a minor to juvenile hall or another place of confinement must take immediate steps to notify a parent, guardian or responsible relative that the minor is in custody and where. The California Courts self-help page on what happens when a youth is arrested adds that a child can make at least two phone calls within one hour of arrest, one to a parent, guardian, relative or employer and one to a lawyer, and that youth 17 and younger must speak with a lawyer before custodial police questioning, a right they cannot give up, with some exceptions for emergencies.

Under California Rules of Court, rule 5.760, the court must consider the probation officer's written report and any other evidence at the hearing.

Step 2: The 48-Hour Rule — When the Hearing Must Happen

Two deadlines run back to back once a child is held, and both are California rules under the Welfare and Institutions Code.

The first is for the petition. Under Welf. & Inst. Code § 631, a minor taken into custody must generally be released within 48 hours, excluding nonjudicial days, unless a petition to declare the minor a ward (or a criminal complaint) has been filed within that time. The rule does not apply when a minor willfully claims to be 18 or older. For a minor arrested without a warrant for a misdemeanor that does not involve violence, a threat of violence or a weapon, and who is not on probation or parole, release within that window is required unless a petition is filed and a judge or referee orders the minor detained.

The second is for the hearing itself. Under Welf. & Inst. Code § 632, a detained minor must be brought before a juvenile court judge or referee as soon as possible, and in any event before the end of the next judicial day after the petition is filed. For that same nonviolent-misdemeanor group, the hearing must happen no later than 48 hours after custody began, excluding nonjudicial days. If the minor is not brought to court within the required period, the minor must be released.

A judicial day is a day the court is open. The Judicial Council's information sheet for parents, JV-060-INFO, notes that courts are closed on Saturdays, Sundays and holidays, so those days do not count. A child arrested before a weekend may therefore wait longer in calendar days than the hour figures suggest.

Step 3: What Happens at the Detention Hearing

Under Welf. & Inst. Code § 635, the court will examine the minor, the parent or guardian, or anyone else with relevant knowledge, and hear relevant evidence the minor, the parent or guardian, or counsel wants to present.

The hearing does not decide whether the child did what the petition says. That question belongs to the jurisdiction hearing. The detention hearing is narrower: whether the child stays in custody while the case moves forward. Under § 635, the court must release the minor unless a prima facie showing has been made that the minor is a person described in § 601 or § 602, meaning the allegations, taken at face value, bring the child within the juvenile court's jurisdiction.

Release is the starting rule. Section 635 directs release unless it appears that the minor has violated a juvenile court order, has escaped from a juvenile court commitment, is likely to flee to avoid the court's jurisdiction, or that detention is a matter of immediate and urgent necessity to protect the minor or reasonably necessary to protect the person or property of another. The circumstances and gravity of the alleged offense may be weighed together with other factors, and the decision may not rest solely on the county where the minor lives.

The Judicial Council's information sheet for parents, JV-060-INFO, states that families do not have to pay fees or repay the cost of an attorney given to the child by the county or court in the case.

Step 4: The Court's Decision — Released, Home Supervision, or Continued Detention

The results the law provides include the following.

Release to a parent or guardian. Under California Rules of Court, rule 5.760, the court must decide whether services are available that would prevent further detention, and if the child can return home with services, the court must release the child and order probation to provide them.

Home supervision. The child goes home under supervision instead of staying in juvenile hall. Under Welf. & Inst. Code § 636, if the court finds the § 628.1 criteria apply, it must place the minor on home supervision for no more than 15 judicial days and must enter its findings of fact in the record. The court may keep, change or add to conditions the probation officer set, and the minor must sign a written promise to obey any new or modified conditions. Section 635 adds that home supervision may include electronic monitoring and that every minor gets equal consideration for it regardless of county of residence.

Continued detention. Under § 636, the court may order the minor held in juvenile hall or another suitable place for up to 15 judicial days if it finds that staying home is contrary to the minor's welfare and that one of the § 635 grounds exists. The court must enter its findings of fact in the record, and under rule 5.760 it must state the facts the detention is based on.

No single result is typical in a way this page can predict. The court weighs the probation report, the statutory grounds, the alleged offense and the child's circumstances. A detention order is also not the end: the case moves on to the jurisdiction hearing either way.

Step 5: After the Detention Hearing — What Comes Next

Whatever the detention ruling, the hearing sets the rest of the case in motion.

The jurisdiction hearing is the stage most like a trial. The California Courts self-help page on the juvenile justice court process explains that a judge, not a jury, decides whether the youth did what is alleged, and the district attorney must prove it beyond a reasonable doubt. If the judge finds the petition true, the child can become a ward of the court.

The disposition hearing follows a sustained petition. The court decides what happens next, which can include probation, placement or, for the most serious offenses, commitment to a secure youth treatment facility. The self-help page describes these facilities as places where a youth committed for a specific amount of time lives, attends school and receives rehabilitative services under a court-approved plan, with periodic review. California's Division of Juvenile Justice no longer operates.

Diversion can arise before a petition. JV-060-INFO explains that the probation officer might offer a diversion program, that each county has different rules and programs, and that if the family agrees and the child completes the program, the juvenile court does not need to become involved.

Sealing is a later possibility, not a promise. Under Welf. & Inst. Code § 786, if a minor satisfactorily completes informal supervision under § 654.2, probation under § 725, or a term of probation for any offense, the court must dismiss the petition and seal the records; satisfactory completion is deemed to have occurred if the person has no new findings of wardship or conviction for a felony or a misdemeanor involving moral turpitude during the supervision or probation, and has not failed to substantially comply with the reasonable orders that are within their capacity to perform. The court may not dismiss and seal under § 786 if the petition was sustained on a § 707(b) offense committed at 14 or older, unless that finding was dismissed or reduced to a misdemeanor or to a lesser offense not listed in § 707(b). Welf. & Inst. Code § 781 separately allows a person to petition for sealing five years or more after juvenile court jurisdiction ends, or at any time after turning 18, if the court finds no felony or moral-turpitude misdemeanor conviction since and rehabilitation to its satisfaction. A petition to seal a record of a § 707(b) offense committed at 14 or older may be filed only in the circumstances § 781(a)(1)(D) lists, unless that offense was dismissed or reduced to a misdemeanor, and a record for which Penal Code § 290.008 requires registration cannot be sealed.

Timeline: From Arrest to Detention Hearing and Beyond

These are California time limits under the Welfare and Institutions Code. The starting point differs from one entry to the next: custody, the petition or the court's order.

  • Day 0, arrest and custody. The probation officer investigates immediately and either releases the child or holds the child under § 628.
  • Parent notification, right away. Under § 627, the officer must take immediate steps to tell a parent, guardian or responsible relative where the child is held.
  • Petition, within 48 hours. Under § 631, a held child must generally be released within 48 hours, excluding nonjudicial days, unless a petition is filed.
  • Detention hearing, by the next judicial day. Under § 632, before the end of the next judicial day after the petition is filed, or within 48 hours of custody (excluding nonjudicial days) for certain nonviolent misdemeanors.
  • Detention or home supervision order, up to 15 judicial days. Under § 636, either order may last no more than 15 judicial days.
  • Jurisdiction hearing, within 30 days, or 15 judicial days for a detained minor. Under Welf. & Inst. Code § 657, once a petition is filed the clerk sets the hearing within 30 days; for a minor detained in custody, the petition must be set for hearing within 15 judicial days from the date of the order directing the detention.
  • Disposition hearing, as the court schedules. It follows a sustained petition on a date the court sets.

For a child who was not taken into custody, California Rules of Court, rule 5.752, requires the clerk to set an initial hearing within 15 court days of the petition's filing.

When the Process Gets More Complicated

Some cases add a layer the basic timeline does not show.

A motion to transfer to adult court

Under Welf. & Inst. Code § 707, the prosecutor may move to transfer a minor to adult court when the minor is alleged to have committed, at 16 or older, an offense listed in § 707(b) or any other felony. A motion is also possible for an offense listed in § 707(b) committed at 14 or 15 if the person was not apprehended before juvenile court jurisdiction ended. The motion must come before jeopardy attaches, the probation officer must submit a social history report, and the court may order transfer only on clear and convincing evidence that the minor is not amenable to rehabilitation in juvenile court. The plea is postponed until the transfer hearing ends. The page on when a minor is tried as an adult covers this in more depth.

An alleged victim or witness

Under § 707, the probation officer's report for a transfer motion includes any written or oral statement the victim offers.

Prior history or a court order already in place

A prior juvenile court order matters at detention: violating one is a listed ground under §§ 628 and 635.

Specific charges

The offense-specific guide to juvenile assault charges in California shows how one charge type moves through these stages.

School and immigration

A juvenile case can carry school consequences that depend on the facts and on rules this page does not cover. Immigration consequences are governed by immigration law this page does not cover.

Talking Through the Detention Stage of Your Child's Case

The detention hearing arrives quickly, and the rules that govern it turn on details such as when the petition was filed and which statutory grounds are raised. This page does not cover how any particular court or county handles these hearings day to day.

To request a consultation about a child's juvenile case, contact Juvenile Justice Defense Group.