because they must reduce the possibility of the evidence contamination. It is a their major role to preserve the evidences and the crime scene as it is(Sonne, 2006,pg.5). However, two investigators entered the crime scene without proper protection wears to collect the evidences. The failure of proper clothing can cause the contamination of the fingerprint evidences. In addition to the proper clothing mistake made by the investigators, one of the biggest mistake made by the investigators is that they have failed to collect the fingerprint from the weapon used during the crime. In the end of the scene, the investigators headed back to the crime scene in order to find the weapon used for the murder. During the process, one of the investigator
