Nightwing, Vol. 2 #68 (2002)

Bruce Wayne: Fugitive - Part Six: Time & Motion
Reasoning that whoever framed Bruce Wayne for Vesper Fairchild's murder must have known about Wayne's double-life as Batman, Nightwing returns to Wayne Manor to perform a sweep of the cave to look for clues. Finding some anomalies in the mainframe's reporting system, he checks the cave for any devices that shouldn't be there... finding one. He provides a full dump of the surveillance system to Robin, asking him to scan it for anything strange, while he heads over to Gotham M.C.U.'s office to examine the Wayne file.
Release Date: 2002