The California Sexually Violent Predator law, codified at Welfare and Institutions Code Section 6600 and following, lets the state keep certain convicted sex offenders confined in a secure state hospital after their prison sentences end if a court finds, beyond a reasonable doubt, that a diagnosed mental disorder makes them likely to commit new sexually violent crimes without treatment and custody. Commitment is indefinite, but it is reviewed every year, and the person can petition for release.
Who the Law Applies To
Two conditions have to be met before anyone can be classified as a Sexually Violent Predator (SVP). The person must have been convicted of a sexually violent offense against at least one victim, and a mental health professional must have diagnosed them with a mental disorder that makes them a danger to others because they are likely to commit sexually violent crimes again without treatment and custody.
Qualifying offenses are the serious ones: rape, sodomy by force, oral copulation by force, lewd acts on a child, and other sexual crimes accomplished through force, violence, duress, menace, or threats of bodily harm. “Conviction” is read broadly. It includes trial verdicts, plea bargains, probation grants, findings of not guilty by reason of insanity, prior findings as a mentally disordered sex offender, and juvenile commitments for qualifying offenses. Convictions from other states count if the elements match a California qualifying offense.
The mental disorder piece does real work. The California Supreme Court held in People v. Williams (2003) that the SVP law requires proof the disorder causes a serious inability to control behavior, tracking the U.S. Supreme Court’s reasoning in Kansas v. Crane (2002). The standard is “serious difficulty in controlling behavior,” not total or complete loss of control. A raised statistical risk of reoffending, by itself, is not enough.
How Someone Is Committed
The process starts inside prison, before the scheduled release date. The Board of Parole Hearings’ SVP Unit screens criminal histories to flag anyone who might meet SVP criteria. Flagged cases move to the Board’s Forensic Assessment Division for clinical review.
If that screening is cleared, the Department of State Hospitals (DSH) runs a full psychological evaluation using two independent evaluators. They look for a diagnosed mental disorder that predisposes the person to further sexual offenses. Pedophilic disorder and other paraphilic disorders are common findings. When the two evaluators disagree, two more experts are brought in to resolve it.
If DSH concludes the person meets SVP criteria, the case goes to the district attorney in the county of commitment. The DA decides whether to file a civil commitment petition. If the DA declines, the person is released to parole, often with community sex offender treatment as a condition of supervision.
Once a petition is filed, a judge first decides whether probable cause exists. If so, the case goes to trial. The proceeding is civil, but the prosecution has to prove beyond a reasonable doubt that the person qualifies as an SVP. The California Supreme Court set that standard in People v. Hurtado (2002), requiring a finding beyond a reasonable doubt that the person is likely to commit sexually violent predatory behavior if released. The verdict must be unanimous. Expert testimony drives most trials, and prosecutors frequently rely on actuarial risk assessment tools like the Static-99R, which estimates reoffense probability from factors such as age, criminal history, and victim characteristics. A finding against the person results in indeterminate commitment to a secure state hospital.
Rights at Trial
Welfare and Institutions Code Section 6603 guarantees anyone facing SVP proceedings the right to a jury trial, the right to an attorney, the right to hire experts to conduct their own evaluations, and full access to their medical and psychological records. If the person cannot afford a lawyer or expert, the court appoints both at public expense.
Defense attorneys routinely retain their own psychologists to challenge the state’s diagnosis and risk assessment, cross-examine the prosecution’s experts, and present evidence that the person no longer poses a danger. In People v. Otto (2001), the California Supreme Court added an evidentiary guardrail: hearsay statements in documents like sentencing reports must carry special indicia of reliability before they can be admitted.
What Happens After Commitment
Committed individuals are placed in a secure DSH facility. Coalinga State Hospital has long been the primary SVP treatment site, though DSH also houses sex offender commitments at Atascadero, Metropolitan, Napa, and Patton.
Treatment centers on cognitive-behavioral therapy and moves through phases. It opens with a full assessment of psychological condition, offense history, and readiness for therapy, and continues through intensive group work on relapse prevention, impulse control, and confronting denial about past offenses. For individuals with severe paraphilic disorders, clinicians may add testosterone-lowering medications or SSRIs. Participation is technically voluntary, but refusing to engage in treatment can seriously hurt a person’s chances at release, because the annual review examines whether they are making progress.
How Someone Gets Out
SVP commitment is indefinite, not permanent. Welfare and Institutions Code Section 6604.9 requires DSH to examine every committed person at least once a year. A qualified professional prepares a written report on whether the person still meets the SVP definition and whether conditional release or unconditional discharge would be safe. If DSH concludes the person no longer qualifies, it forwards that recommendation to the court.
The person does not have to wait on DSH. Under Section 6608, anyone committed as an SVP can petition the court for conditional release on their own. The court can deny a frivolous or unsupported petition without a hearing, but a credible showing triggers one. At the hearing, the state carries the burden and must prove beyond a reasonable doubt that the person’s diagnosed mental disorder still makes them dangerous and likely to engage in sexually violent criminal behavior if released. If the state cannot meet that burden, the court can order conditional release or unconditional discharge.
Life After Release
Conditional release moves the person from a locked hospital to intensive community supervision through the Conditional Release Program (CONREP), which DSH runs. A court must approve a specific placement plan, and there is a 30-day public notification period before the placement hearing.
CONREP patients live under tight conditions: a court-approved treatment plan with individual and group clinical contact, random drug screenings, home visits, substance abuse screenings, and ongoing psychological assessments. DSH files quarterly and annual progress reports with the court, and noncompliance can send the person back to the state hospital. Under Welfare and Institutions Code Section 6608.1, every person on conditional release wears a GPS monitoring device until unconditional discharge. The GPS system transmits location continuously and alerts supervising agents to restricted-area entries, zone departures, curfew violations, or device tampering. Unconditional discharge ends both the monitoring and the supervision.
Residency rules are strict. Proposition 83, California’s version of Jessica’s Law, passed in 2006, bars anyone required to register as a sex offender from living within 2,000 feet of a school or park. That eliminates large portions of most cities and makes housing one of the hardest parts of reintegration. Sex offender registration under Penal Code Section 290 uses a three-tier system: 10 years for Tier 1, 20 years for Tier 2, and lifetime registration for Tier 3. Given the offenses underlying SVP commitments, most released SVPs fall into the top tier. Registration means regular check-ins with local law enforcement and keeping the state informed of your address; failing to register is a separate crime.
Proposition 83 also reshaped the commitment structure itself. Before the initiative, SVP commitments lasted two years and had to be renewed through a new trial. The initiative replaced that with the current indeterminate model subject to annual review and the person’s right to petition for release.
Constitutional Grounding
California’s SVP law rests on Kansas v. Hendricks (1997), where the U.S. Supreme Court upheld involuntary civil commitment of sexually violent predators and distinguished civil commitment aimed at treatment and public protection from criminal punishment, and on Kansas v. Crane (2002), which requires proof of serious difficulty in controlling behavior. California’s diagnosis-plus-dangerousness framework, judged under a beyond-a-reasonable-doubt standard, is built to satisfy both.