On July 18, 2013, Tyrone West, a 44-year-old African American male, was pursued by two officers of the Baltimore Police Department after he fled a traffic stop during which cocaine was allegedly found. The cocaine later went missing in police possession after a subpoena was issued. West was on parole at the time of this incident with an extensive criminal record including assault, resisting arrest, and attempted first-degree murder. West ultimately died during the scuffle with police and various medical experts have given conflicting assessments of contributing factors including cardiac arrhythmia, dehydration, positional asphyxia, and extreme environmental temperatures.