Several people saw a man shoot and kill 17-year-old Allen Joplin outside a party in Lower Queen Anne in January, but nobody has come forward. “Snitches end up in ditches. We kill those guys, we kill those guys,” a gang member told KING 5 in a story yesterday. Detectives say the code of the street, “don’t snitch” has made investigating cases like the Joplin murder very difficult to break.