When a criminal investigator retires, he/she turns in their law books, their procedural manual, and computer, but he/she will take with him/her the most valuable asset, his/her experiences. Law enforcement must develop the supportive structure to capture those experiences before they are lost forever. One way of doing this is through knowledge management. There are three concepts to knowledge management: (1) define what knowledge is relevant to an individual versus an organizational context; (2) enterprise knowledge management builds on all internal and external sources of knowledge; and (3) ascribe to the belief and practice that knowledge management is people as a mantra is the key. A criminal investigator’s critical skills consist of developing a strategy for case investigation, interviewing victims, testifying competently in a court setting, and most importantly interrogating a suspect. These critical skills most often do not get documented anywhere other than in the investigator’s mind. These facets of the investigative process can become a treasure chest for a knowledge management endeavor. Avenues in which to capture and diffuse the tacit knowledge can include: the Internet, expert directories, white papers and in-house journals, training bulletins, mentoring, rotational assignments, and chief knowledge officers.