Biological Treatment Methods

Pharmacological Interventions: Anti-social and criminal behaviour is sometimes linked with mental health issues like ADHD, Depression, Anxiety, or Impulsive Disorders, and can be regulated using medications. Return to normal brain functioning can significantly reduce criminal and anti-social tendencies.
Neurofeedback Therapy: This technique allows individuals to learn self-regulation and, in turn, improve problematic brainwave patterns. It has been effectively applied to treat issues like addiction and aggression.

Hormonal Therapy

Gonadotropin-releasing hormone (GnRH) Agonists: These drugs can reduce testosterone levels and manage hyper-aggressive behaviour linked with an excess of this hormone.
Selective Serotonin Reuptake Inhibitors (SSRIs): This class of drug affects the neurotransmitter serotonin in the brain which can help manage impulsivity and aggression issues.

Genetic Therapy

Gene Therapy: Though still in early stages, gene therapy can potentially help minimise criminal behaviour by correcting the gene mutations associated with aggression and impulsivity.

Nutritional Therapy

Nutritional Supplements: Evidence suggests diet adjustments and nutritional supplementation, like Omega 3 fatty acids, can potentially have a calming effect and help reduce impulsive and aggressive behaviour.

All these treatment methods should be seen as complementary to psychological treatment models and are most effective when used as part of a holistic approach to treatment.