Is Criminal Behaviour More Likely in People with Untreated ADHD and ODD?

Posted September 9, 2025 Updated September 9, 2025 Author: Avery Lombardi, MSc Reviewed by: Dr. Rebecca Fernandez, MBBS

Yes, individuals with untreated ADHD and ODD criminal risk are higher risk due to symptoms of both conditions that can lead to criminal behaviour. Both conditions can contribute to impulsivity, emotional dysregulation, and difficulties with authority, which, if not addressed, can lead to escalating behavioural problems.

ADHD and ODD Risks and Impulsivity

ADHD and ODD risks are compounded by the impulsivity that is characteristic of both disorders. ADHD makes it difficult for individuals to control their impulses, leading to reckless decisions or actions without considering the consequences. When combined with ODD, which involves defiance and disregard for authority, these impulsive behaviours can escalate into more severe actions, including aggression or rule breaking.

The Role of Untreated ADHD

Untreated ADHD increases the likelihood of involvement in risky behaviour due to difficulties with attention, self-control, and emotional regulation. Children and adolescents with untreated ADHD may act impulsively, making poor decisions without thinking about long-term consequences. This impulsivity can lead to problems with authority figures, legal issues, or even substance abuse, all of which are linked to a higher risk of criminal activity.

ODD and Aggressive Behaviour

ODD, which often manifests as defiance, irritability, and aggression, can further amplify these behaviours. Children and adults with ODD may have frequent conflicts with family, teachers, or peers, and as they get older, this can lead to more serious confrontations with authority figures.

In conclusion, early intervention through therapy, behavioural strategies, and medication can significantly reduce the untreated ADHD and ODD criminal risk by teaching individuals how to manage their emotions, develop problem-solving skills, and control impulsive behaviours.

Visit providers like ADHD Certify for personal consultations and expert guidance tailored to your unique situation.

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Oppositional Defiant Disorder.

Written by

Avery Lombardi, MSc

Avery Lombardi is a clinical psychologist with a Master’s in Clinical Psychology and a Bachelor’s in Psychology. She has professional experience in psychological assessment, evidence-based therapy, and research, working with both child and adult populations. Avery has provided clinical services in hospital, educational, and community settings, delivering interventions such as CBT, DBT, and tailored treatment plans for conditions including anxiety, depression, and developmental disorders. She has also contributed to research on self-stigma, self-esteem, and medication adherence in psychotic patients, and has created educational content on ADHD, treatment options, and daily coping strategies.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy.

Reviewed by

Dr. Rebecca Fernandez, MBBS

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy.