Tunnel vision is a type of misconduct by police and public attorney, where they are so strictly dependant on one theory for analysing the crime that they find a way to interpret every information and documentation about the crime in favor of that theory. This vision fails chacking validity of the explanations suggested other than the fixed theory.
Finally, the evaluations said his attitude and judgment were slipping due to "tunnel vision" which led him to desire only to ride his motorcycle. McManigal's supervisor said if his attitude did not change, a transfer would be recommended.See McManigal v. City of Seal Beach (1985)
