Differences in personality and mental state between suspects and witnesses immediately after being interviewed by the police

There is increased recognition that people interviewed by the police are often psychologically vulnerable due to modest intelligence, mental health problems, disturbed mental state, and personality problems. The current study aimed to investigate differences in the mental state and personality between suspects and witnesses. The participants were 78 individuals (47 suspects and 31 witnesses) who had been interviewed by the Icelandic police. They were assessed psychologically immediately after the interview with the police was completed. Significant differences emerged between the two groups with the suspects being more depressed, hopeless, compliant and personality disordered than the witnesses. Four of the suspects claimed to have made a false confession to the police due to their immediate need or psychological problems.