At 9:02 a.m. on April 19, 1995, a massive explosion rocked downtown Oklahoma City, shearing off the front of the Alfred P. Murrah Federal Building and killing 168 people, including 19 children in the building's daycare center. The blast sent shockwaves across the country, both literally and figuratively. In the chaos that followed, investigators sifting through the rubble found a twisted fragment of a Ryder rental truck. Using it as their starting point, the FBI identified and arrested the individuals who planned and executed this heinous crime in less than four days. This book narrates the events that unfolded during those four days. It is recounted by someone who was there - FBI Special Agent R. Scott Crabtree. Telling his story for the first time, Crabtree takes the reader behind the scenes of the investigation and its race to find the killers before they could strike again. Crabtree, a former Marine, retired from the FBI in 2007 after serving as an agent for nearly 25 years.