Recuse is used when someone legally involved must not influence a case due to personal connections. As her brother was the defendant, the prosecutor had to recuse herself to maintain fairness.
Pro Tip 2/3
Not Just Judges
'Recuse' isn't only for judges. Lawyers, jurors, and others in legal proceedings can also recuse themselves. The juror recused himself upon realizing he knew the witness personally.
Pro Tip 3/3
Conflicts of Interest
Recusal is necessary to avoid conflicts of interest that can sway legal decisions. She recused herself from the committee to avoid any conflict with her family's business.