Paleontologist brothers Neal and Peter Larson built a business, the Black Hills Institute of Geological Research, specializing in collecting, selling, and especially, finding fossils. In 1990, on a field expedition in South Dakota, volunteer Susan Hendrikson was searching on her own when she discovered the tip of a vertebrae protruding from a cliff. The Tyrannosaurus Rex skeleton was over 80 percent complete, a rare and exhilarating find. The excavation of “Sue,” named after the woman who found her, lasted 17 days, at which point the brothers paid the landowner for the skeleton and moved it back to their offices, where a team embarked on reconstruction work expected to take years. In 1992, everything came to a dramatic halt when the FBI came knocking at their door with warrants to seize the remains, alleging that the skeleton had been stolen from federal land. Dinosaur 13 lays out the ensuing lawsuit, bringing key moments to life through the emotional recollections of the people at its center.  ST