"War Crimes, Part 2 of 4: Minor Discrepancies" continued from Detective Comics #809 and continues in Detective Comics #810.
*Batman swings down on Joker and the impostor Batman. He takes down the Joker, tells aaron Black to get lost, then goes after the impostor. He finally catches up with his impostor, Black Mask. He escapes after gassing Batman.
Back in the cave, Bruce finds some problems with the medication inventory at Dr. Thompkins' clinic and what was (or wasn't) given to Stephanie. It appears that she'd been neglected of her needed meds.
Rodriguez does a pre-interview with Stephanie Brown's mother - he planned on having her on his show the next day. He was appalled to find Aaron Black giving an interview on a competing channel about being attacked by two Batmen the previous night. He also implied that Rodriguez was in Black Mask's pocket.
Batman went to the normal digs to get information on Black, Black Mask, Dr. Thompkins, and Joker. He leaves, acting overwhelmed, so his recorders could pick up conversations. *Source: ComicBookDB.com