This case study explores the interaction of brain pathology, criminal behaviour and art in forensic psychiatry through the case of a 68-year-old man exhibiting neuropsychiatric symptoms and delusions. His progressive cognitive and emotional deterioration led to aggressive behaviour, threats towards colleagues and family and allegations of violent and sexual assault. After months of his refusing treatment, magnetic resonance imaging revealed a grade IV glioblastoma. Despite the terminal diagnosis, he was placed in a forensic acute psychiatric unit while under prosecutorial investigation, because his actions remained criminally relevant. In this restrictive setting, he turned to drawing as his primary coping strategy. His artwork offered both an outlet for suffering and a means of transcending a situation characterised by severe illness, legal deprivation of liberty and existential despair. The case illustrates the benefit of creative expression when medical and legal circumstances appear intractable. It also raises ethical and forensic concerns, including impaired culpability due to amygdala and prefrontal damage, refusal of care, thoughts of physician-assisted suicide and the attribution of legal responsibility.