BBC journalist Franz Strasser has filmed through rubber bullets and tear gas in Rio de Janeiro and has at times been told by police to stop filming while on assignment. But he had never been ordered to delete footage until Wednesday, after he and a fellow journalist came upon the scene on Interstate 66 where Vester Lee Flanagan crashed a car following a pursuit by Virginia State Police. A trooper told Strasser that police would need to seize his camera because his footage could be evidence, but then ordered him to delete the footage. The trooper watched as the journalist...