All state officers and judges of the district court shall be liable to impeachment for crimes, misdemeanors and malfeasance in office, but judgment in such cases shall not extend further than removal from office and disqualification to hold any office of honor, trust or profit, or to vote under the laws of this state; but such officer or judge, whether convicted or acquitted shall, nevertheless, be liable to prosecution, trial, judgment, punishment or civil action, according to law. No officer shall exercise any powers or duties of his office after notice of his impeachment is served upon him until he is acquitted.