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History of the Law Defining the Standard
The United States Supreme Court held in Dusky v. United States that a criminal defendant must be able to understand the nature of the proceedings and cooperate with defense counsel. Subsequently in Pate v. Robinson, the Supreme Court held that a hearing concerning the defendant’s fitness must be held when a bona fide doubt exists as her or his fitness. These requirements are codified in the Illinois law at 725 ILCS 5/104-10, which provides that a “defendant is unfit if, because of his mental or physical condition, he is unable to understand the nature and purpose of the proceedings against him or to assist in his defense.”
In Jackson v. Indiana, the Supreme Court upheld the confinement of unfit defendants to restore fitness. However, the court limited such confinement to:
“The reasonable period of time necessary to determine whether there is a substantial probability that he will attain that [fitness] in the foreseeable future. If it is determined that this is not the case, then the State must either institute the customary civil commitment proceeding that would be required to commit indefinitely any other citizen or release the defendant. . . . [E]ven if it is determined that the defendant probably soon will be able to stand trial, his continued commitment must be justified by progress toward that goal.”
In response, Illinois has created a detailed statutory system for confining unfit defendants (often referred to in Illinois as “USTs”) codified at 725 ILCS 5/104-15 through 104-31. The Illinois law gives every unfit defendant who remains confined for more than one year, the right to a “discharge hearing” to challenge the sufficiency of the evidence in the case 725 ILCS 5/104-23, 104-25.
Illinois’ Fitness Standard
The Illinois Fitness standard is based on the Dusky standard.
“A defendant is presumed to be fit to stand trial or to plead, and be sentenced. A defendant is unfit if, because of his mental or physical condition, he is unable to understand the nature and purpose of the proceedings against him or to assist in his defense.” 725 ILCS 5/104-10
The standard describes a two-pronged approach to fitness:
1. Factual understanding: The individual can accurately identify the basic facts of the court process, including the charges, possible outcomes, and the roles of courtroom participants. It reflects an ability to know what is happening in court, even if the individual may not fully understand what it means for them.
2. Rational understanding: The individual can apply basic courtroom information to their own case in a reality based and meaningful way. It reflects an ability to understand what is happening, why it matters, and how it personally affects them. With rational understand the individual has the ability to collaborate with the attorney.
Fitness does NOT require perfect legal knowledge or flawless reasoning, just enough understanding and ability to participate meaningfully in their own defense.
Fitness is a present-tense legal standard, not a clinical diagnosis.
"Outpatient-First" Approach to Fitness Restoration
Across the nation, states are facing increased demands for fitness restoration services. There are concerns regarding individuals waiting for restoration services for extended periods, often in jail, before conviction and while presumed innocent. Recent litigation and reform efforts across multiple states have focused on reducing unnecessary detention, expanding community-based treatment options, and ensuring restoration services are delivered in the least restrictive setting.
The growing shortage of forensic inpatient beds is a significant challenge. States have been encouraged to expand outpatient restoration pathways where appropriate, with many reevaluating traditional inpatient-only restoration models in response to constitutional concerns, resource limitations, and the recognition that not all individuals require hospital-level treatment to participate meaningfully in legal proceedings.
Illinois has actively worked to address these national challenges through expanding both inpatient and community-based restoration options. Consistent with broader national trends, Illinois recognizes that not all individuals found Unfit to Stand Trial (UST) require inpatient restoration and that many individuals can safely and appropriately receive services in community settings with appropriate supports and oversight. Illinois updated its fitness statutes (Public Act 104-0318 HB2572) to support an outpatient-first restoration framework. The updated law emphasizes use of the least restrictive, therapeutically appropriate setting and creates a presumption toward outpatient restoration when clinically and legally appropriate. The changes also encourage greater consideration of individualized treatment needs, risk factors, available community services, and whether inpatient-level care is truly necessary to restore fitness.
The statutory updates reflect a broader shift occurring nationally toward balancing constitutional protections, public safety, clinical needs, and access to treatment while reducing unnecessary reliance on inpatient forensic hospitalization. Illinois continues to expand both inpatient and outpatient restoration capacity as part of ongoing statewide efforts to improve access to timely, appropriate, and least restrictive restoration services.
The Evolving Legal Landscape for Misdemeanor Fitness Approach
As mentioned in Deflection and Diversion, Public Act 104-0318 HB2572, also known as the Diversion of Unfit Misdemeanants Act, permits diversion and community-based responses for certain individuals charged with misdemeanors found Unfit to Stand Trial (UST). The Act recognizes that many individuals found unfit remain involved in the criminal justice system longer than they would have if convicted of the underlying misdemeanor offense, and because of this, they do not receive the long-term behavioral health treatment or community support needed to reduce future system involvement. The legislation further emphasizes the importance of connecting individuals to behavioral health services, case management, substance use treatment, and ongoing community-based supports where appropriate. It does note that individuals charged with petty offenses or infraction of a municipal ordinance are not eligible for fitness restoration services.
At the county level, Illinois supports a range of diversion and deflection services designed to reduce justice system involvement for individuals with mental illness. These services commonly include:
- Crisis Intervention Team (CIT)-trained law enforcement officers
- Co-responder models that pair law enforcement officers with mental health professionals
- 988 and Mobile Crisis Response services
- Mental Health Courts
- Pretrial diversion programs
- Jail-based behavioral health screening and linkage services
- Community treatment providers offering:
- Outpatient care
- Case management
- Housing supports
- Assertive Community Treatment (ACT) services
Together, these programs seek to identify behavioral health needs early, divert individuals from arrest or incarceration when appropriate, connect them to treatment and supports, and reduce recidivism by addressing the underlying factors contributing to justice involvement.