Mental health pilot: My experience with the police
4 January 2014 Last updated at 12:27 GMT
Mental health nurses will be based in police stations and courts in 10 areas of England as part of a pilot scheme aimed at cutting reoffending.
The nurses' duties will include helping officers to respond to calls and identify those with problems.
Roger has a long history of trouble with his mental health and the police, who he says do not have the training to deal with him.