In a recent study scientists have observed an association between certain proteins and dementia sufferers` tendency to commit criminal acts. The research published in the journal JAMA Network Open studied deceased patients who were diagnosed with Alzheimer`s disease or frontotemporal dementia. This study is unique in that we studied deceased patients something that means we are 100 per cent sure of the dementia diagnosis which is not always established while the patients are alive said Madeleine Liljegren a researcher. In addition we observed that the likelihood of committing criminal acts was nine times higher among patients with frontotemporal dementia who