—Richard H. Walton, Ed.D., author of Cold Case Homicides: Practical Investigative Techniques
"For the investigator, Pettem’s work will undoubtedly jump-start many a stalled investigation and keep others moving forward. For cold case unit managers, it opens up a world of new opportunities––the opportunity to expand the capacities of their units, take advantage of free resources, and to institute changes that address the outdated attitudes, policies, and procedures that, in the past, prevented some cases from being solved. At the same time, Cold Case Research promises to keep others from going cold in the future."
—From the Foreword by Detective James Trainum, Metropolitan Police Department (Retired), Washington, D.C.
"WOW! The book reflects the compassion of the author - smart and fascinating! This is the "textbook" for missing, unidentified and homicide investigations. A valuable addition to any investigating agency's library as a resource and training tool. A wise and informative guide for advocates and volunteer organizations. Well done!"
—Todd Matthews, Media Relations /DoeNetwork.org & Communications and Outreach Manager for NamUs @ UNTHSC
"The literature on cold case investigations tends to fall into two genres; practical resources for cold case investigators or true crime public interest books dramatically depicting unsolved murders for an interested public. While this book falls firmly into the former category, designed to be a useful resource for cold case detectives, it nevertheless also manages to successfully straddle the latter camp, by providing interesting case study examples of cold case investigations and investigations into missing persons and the unidentified dead. It is this mix of practical resources and vivid case study examples that sets this book apart from other similar texts."
—Cheryl Allsop, Lecturer of Criminology and Criminal Justice, University of Glamorgan