Computer Aided Dispatch are logs which track when Law Enforcement receives a call and when officers are dispatched to the scene.  Importantly they may also provide information on cars or persons that law enforcement should be on the look out for (aka BOLO).  They may also provide information on persons that police spoke with at the scene of an accident.  They also can prove if breath tests were given within a three hour window or driving.  They are an important piece of discovery that should be provided by the State.