The objectives of this paper are (1) to recognize the current issues of national mental health crisis, the increased legal entanglement of mentally ill patients, the increased surge of criminal activity and the erosion of public trust amongst police officers (2) to present legal concepts such as insanity defense and the overview of criminal process. (3) to present 4 case scenarios for purposes of discussion (4) to realize the necessity for collaboration of the legal system and mental health system to address challenges in individuals with combined criminal act and mental illness. The method involves presentation for 4 case scenarios chosen from career practice as a psychiatrist and from breaking news that happened at the time. Discussion is employed to bring to light the 4 case scenarios integrating the concepts of mental health system and legal system. Conclusion affirms the necessity of collaboration of legal system and mental health system as part of solutions to improve existing challenges and current issues of national mental health crisis, lack of access to mental health care, increased criminal activity and erosion of public trust, and efficacy of public service providers.