The Crisis Intervention Team (CIT) program was first developed to reduce violence in encounters between the police and people with mental illness as well as provide improved access to mental health services. Although there is overwhelming popular support for this intervention, scant empirical evidence of its effectiveness is available--particularly whether the program can reduce the use of force. This investigation seeks to fill this gap in the literature by exploring the factors that influence use of force in encounters involving people with mental illness and evaluating whether CIT can reduce the likelihood of its use. (Contains 6 tables and 5 notes.)