/ˈprɑːsɪkjuːtər/

pros·ecu·tor

BrE /ˈprɒsɪkjuːtə(r)/

NAmE /ˈprɑːsɪkjuːtər/

a public official who charges sb officially with a crime and prosecutes them in court

the public/state prosecutor

a lawyer who leads the case against a defendant in court