You are an attorney, and the local court has appointed you to represent a defendant who has been charged with aggravated assault and battery. the prosecutor originally intended to charge attempted murder. the victim suffered serious injury, and the police suspected that a weapon of some type was used, but never was able to find one. the defendant has maintained that there was no weapon. your client tells you that there really was a weapon and that the police missed it at the crime scene. according to the aba's model rules of professional conduct, your duty is to: