go into hiding(вполне официальный термин (по крайней мере, в Англии): ...where the court has issued a warrant for the committal of a contemnor and where the contemnor has gone into hiding, being careful whilst giving instructions to his solicitors not to reveal his whereabouts to them, it is just and convenient to issue a mandatory injunction ordering the contemnor to surrender himself to the tipstaff so that he may execute the warrant of committal.4uzhoj)
hide the ball(It is a legal slang for withholding evidence in a trial. It means you are aware of evidence that could result in your legal team losing. You are sworn as an officer of the court to bring the evidence to the judge. More and more lawyers and prosecutors practice hiding the ball.quora.comMillie)