Silvia Pettem was for many years a columnist for the Boulder (CO) Daily Camera. As an advisor to the Boulder Police Department, she has helped in reviewing evidence in a number of unsolved cases, including the Jon Benet Ramsey murder case. She the author of Someone's Daughter: In Search of Justice for Jane Doe (Taylor Trade, 2009), Cold Case Research: Resources for Unidentified, Missing, Cold Homicide Cases (CRC Press, Taylor & Francis Group, 2013), The Long Term Missing: Hope and Help for Families (Rowman & Littlefield, 2017) and Cold Case Chronicles: Mysteries, Murders & the Missing (Lyons Press, 2021). She lives in the mountains outside of Boulder, CO.