Detective Comics Vol.1 #411
Batman scales the side of Gotham's Statue of Freedom for a secret meeting with an informant inside the torch; The informant wants police protection in exchange for turning over evidence on Doctor Darrk and the League of Assassins; Before the criminal can reveal anything however, an assassin sneaks into the chamber and stabs him from behind.
Printed: May 1971
Writers: Denny O'Neil
Art: Bob Brown and Dick Giordano
Cover: Neal Adams