This issue contains four primary articles that cover issues important to investigative police work. The first article, Protecting Cultural Heritage from Art Theft, examines how art crime at the local and international levels can be potential sources for funding organized crime and terrorist activities. The second article, Perspective: The Disease of Certainty, discusses how law enforcement's perception of certainty can cause investigative errors in homicide investigations. The third article, Focus on Training: Training for Deadly Force Encounters, discusses solutions for police trainers to use in instructing officers who must deal with deadly force situations. The fourth article, The Exigent Circumstances Exception after Kentucky v. King, discusses the U.S. Supreme Court's decision in this case which provides improved guidance to police officers in matters related to the fourth amendment.