If I built a safe in which combination A would open the door, but combination B would activate a system to incinerate the contents and upon presentation of a va

If I built a safe in which combination A would open the door, but combination B would activate a system to incinerate the contents and upon presentation of a valid warrant for the contents of the safe I entered, or directed another to enter, combination B...could I be accused of tampering with evidence? Does that re-phrasing clear up the question?