Police in Durham will use artificial intelligence software to assess whether a suspect should be kept in custody. The Harm Assessment Risk Tool (Hart) was trained on Durham Police record data from between 2008 and 2012, and calculates the suspect’s likelihood of offending on a low, medium and high risk basis. It was tested on humans in 2013, and the force monitored the AI’s judgements over the course of the next two years whether the suspects went on to offend. B8PB5Y Artificially Coloured MRI Scan Of Human Brain. Image shot 2009. Exact date unknown. Artificial intelligence can predict whether the suspects will offend in the future (Photo: Alamy) Its expectations for suspects it determined were low-risk were correct 98 per cent of the time, while its high-risk assessments were accurate in 88 per cent of cases. The predictions were made using past history with the police, if any, postcode, gender and other information. Hart is designed to err on the side of caution and place a suspect in the medium or high risk category, and did not affect the decisions made by the custody sergeants, Sheena Urwin, head of criminal justice at Durham Constabulary told the BBC.