Use immunity is defined as?

Immunity that prevents the government from using the testimony of the defendant or witness against him or her in the trial of that matter. Future new evidence, however, can be used against them.

Immunity that prevents the government from using the testimony of the defendant or witness against him or her in trial, including any future evidence.

Immunity that prevents the use of any testimony given by others to be used against the defendant or witness in trial. But future new evidence can be used against them.

Immunity that prevents the use of any testimony given by others to be used against the defendant or witness in trial, including any future new evidence.