## Facts

- Alfredo A., a minor, was arrested without a warrant in Los Angeles for alleged possession of cocaine base for sale and was detained in juvenile hall.
- He sought extraordinary relief, arguing the Fourth Amendment requires a judicial determination of probable cause within 48 hours of a warrantless arrest.
- The challenged local practice followed California juvenile procedures, which generally provide for a detention hearing (including a probable cause determination) within approximately 72 hours, subject to statutory timing rules.
- The claim concerned the timing and form of the probable cause determination for a detained juvenile, not the merits of the delinquency allegations.
- Although Alfredo was released, the courts addressed the legality of the practice as a recurring issue likely to evade review.

## Issues

1. Whether the Fourth Amendment 48-hour benchmark for probable cause determinations after warrantless arrests applies to juvenile detention proceedings.
2. Whether California’s juvenile detention scheme, which generally permits a detention hearing with a probable cause determination within about 72 hours, satisfies the constitutional requirement of a prompt judicial probable cause determination.

## Decision

- The California Supreme Court affirmed the denial of relief.
- The Court held that the 48-hour benchmark associated with adult warrantless arrests does not apply mechanically to juvenile detention proceedings.
- The Court held that California’s juvenile statutory scheme, providing a detention hearing that includes a judicial probable cause determination within about 72 hours (as calculated under the statute), satisfies Fourth Amendment promptness requirements in the juvenile context.

## Legal Principles

- The Fourth Amendment requires a prompt judicial determination of probable cause as a prerequisite to extended detention following a warrantless arrest.
- A 48-hour timeframe is a general benchmark for adult probable cause determinations, but it is not an inflexible rule for all detention systems.
- Juvenile proceedings differ from adult criminal proceedings; constitutional analysis must account for the juvenile system’s structure and its balance of flexibility with due process and fundamental fairness.
- A detention hearing that promptly addresses both continued custody and probable cause can satisfy constitutional requirements even if it occurs on a timetable longer than 48 hours, when assessed in the juvenile procedural framework.

## Conclusion

The court upheld California’s juvenile detention timetable, concluding that juveniles are not constitutionally entitled to a rigid 48-hour probable-cause determination after a warrantless arrest where the statutory detention hearing process provides a judicial probable cause finding within approximately 72 hours.


Alfredo A. v. Superior Court, 6 Cal. 4th 1212 (Cal. 1994)