When conducting a crime, perpetrators can leave signals that represent valuable information being left behind. This can include eyewitness descriptions, murder weapons, fingerprints, and others. However, Investigators cannot make conclusions based on one type of evidence, so gathering all kinds of information is essential. For instance, gathering information from witnesses and complainants for a ”full picture” of the offense. The information gathered has the potential of being irrelevant, incomplete, inaccurate, or not useful to the investigation, but it still should be collected. In an investigation, information gathering should be performed according to the procedure.