Cops outraged after ‘Blue Lives Murder’ apparel surfaces on Amazon. Amazon is still hawking “Blue Lives Murder” merchandise almost a year after similar anti-cop gear first came to light — sparking renewed outrage from the Big Apple’s detective’s union, who accused the e-tailer of putting cops “at peril and risk.” In a recent letter, the Detectives’ Endowment Association demanded Amazon stop selling the “disgusting” items emblazoned with the message “Blue Lives Murder.” “It has come to my attention that your website is selling tee-shirts (sic) and other items emblazoned with the words ‘Blue Lives Murder,’” reads part of the letter sent by the DEA to the company’s Chief Financial Officer Brian Olsavsky and obtained by The Post.