Examining the propensity and nature of criminal risk behaviours in frontotemporal dementia syndromes and Alzheimer's disease.

The Misdemeanours and Transgressions Screener is a new tool to assess criminal risk behaviours.Forty-seven percent of patients with dementia show criminal risk behaviour after dementia onset.Behaviours included verbal abuse, traffic violations, physical assault.New onset of criminal risk behaviours >50 years is a clinical sign for frontotemporal dementia.