Contains provisions relating to law enforcement officer accountability

HB 257 revises Missouri law to clarify when law enforcement officers may use force and strengthen accountability measures. It bans respiratory choke-holds (except as permitted under other law) and mandates immediate dismissal for violations. The bill requires officers to intervene and report excessive force during arrests or custody, protects those who report unconstitutional conduct from retaliation, and sends cases of failure to intervene to prosecutors for potential criminal charges. This law directly affects Missouri law enforcement officers and their agencies by setting clearer standards for force use and intervention.