In recent years, the Burbank Police Department (BPD) in Burbank, California identified that a substantial portion of its patrol personnel and resources were routed to calls for mental health service calls. In 2012, to address the inefficient use of resources, provide better continuity of care, and enhance officer safety with high-risk individuals with suspected mental illness, BPD implemented the Mental Health Evaluation Team (MHET). This co-response team pairs a specially trained patrol officer and a Los Angeles County Department of Mental Health Clinician. Together, they offer specialized patrol support, training, and crisis intervention response to the Burbank community. This thesis presents the results of a 4 month evaluation of MHET, and involved qualitative, quantitative, social network, and field research methodologies. The purpose of this evaluation was to examine whether MHET is meeting its enumerated goals, and to add to the growing body of evaluation literature involving crisis intervention co-response models.