Prosecute

[Sarah]

To pursue with the intention of punishing; to accuse of somecrime or breach of law, or to pursue for redress or punishment,before a legal tribunal; to proceed against judicially; as, toprosecute a man for trespass, or for a riot. To acquit themselves and prosecute their foes. Milton.

[Agnes]

to officially accuse someone of committing a crime in a law court, or (of a lawyer) to try to prove that a person accused of committing a crime is guilty of that crime:

[Zipporah Schumaker]

Institute legal proceedings against (a person or organization)