The April death of a West Baltimore man in police custody quickly spiraled into a controversy that left some city neighborhoods in flames, and brought attention from national and international media. Within days, the name Freddie Gray became associated with the broader debate over the way police across the nation treated African-Americans. Central to that debate was a singular question: How did Gray die? The Baltimore Sun set out to provide an answer by investigating allegations of police brutality and dissecting the crucial minutes after Gray was arrested. Reporters revealed that Gray was not the first person to be seriously injured in a police transport van, and that officers routinely ignored calls by detainees for medical care.