criminal justice
Refers to the system of law enforcement, courts, and corrections dealing with crime.
Reform of the criminal justice system is being demanded.
He majored in criminal justice at university.
司法 is the broader 'administration of justice' or 'judiciary'; 刑事司法 specifically refers to the criminal side.
刑事 can mean 'detective' or 'criminal matter'; 刑事司法 is the institutional system.
criminal justice system
Compound of 刑事 (criminal) and 司法 (administration of justice).