This bill would create a new federal crime making mayors of "sanctuary cities" criminally liable for manslaughter if an undocumented immigrant commits murder within their jurisdiction and the mayor's sanctuary policies contributed to the failure to detain or remove that person beforehand. Mayors convicted under this provision would face up to seven years in prison, fines, and mandatory removal from office. The bill defines sanctuary cities as jurisdictions that restrict local law enforcement cooperation with federal immigration authorities or compliance with ICE detainer requests. The Attorney General would have exclusive authority to investigate and prosecute these cases in federal court. The law would take effect 90 days after enactment, with no specific funding authorization mentioned in the legislation.