“Revolutionary. Reads like a page-turner yet will educate even the most experienced investigator―cold case or otherwise.”
―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to expand the capacities of their units, take advantage of free resources, and to institute changes that address the outdated attitudes, policies, and procedures that, in the past, prevented some cases from being solved.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

“Revolutionary. Reads like a page-turner yet will educate even the most experienced investigator―cold case or otherwise.”
―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

Silvia Pettem is a longtime historical researcher, newspaper columnist, and author of more than a dozen books. After decades of work for individuals, businesses, and governments, her life took a new turn in 1996, when she stumbled upon the gravestone of a Jane Doe, a murder victim from 1954. A few years later, Pettem applied her research skills to both old-fashioned detective work and the power of the Internet by entering into a successful partnership with her local sheriff and forensic experts of the Vidocq Society to determine the young woman’s identity. Pettem chronicled their work in Someone’s Daughter: In Search of Justice for Jane Doe.

In 2008, the Boulder County Sheriff’s Office gave Pettem a Sheriff’s Commendation Award for doing the “lion’s share of the research” on the Jane Doe case. Two years later, the Vidocq Society presented her with its Medal of Honor.

While continuing to volunteer for the Sheriff’s Office, Pettem is now an associate member of the Vidocq Society, a volunteer in the detectives section of the Boulder Police Department, a NamUs Academy graduate, and a NamUs instructor in classes sponsored by the Colorado Bureau of Investigation, expanding her expertise and working with colleagues all over the country.