Final answer:
Prosecutor Grace uses a Peremptory challenge to remove the potential juror.
Step-by-step explanation:
Prosecutor Grace removes the potential juror from the jury pool through the use of a Peremptory challenge. Peremptory challenges allow attorneys to remove potential jurors without specifying a reason. In this case, Prosecutor Grace may believe that the potential juror's twin brother's conviction on domestic violence charges and prison sentence could bias their judgment.
Learn more about Peremptory challenge in jury selection