You were a part of the Legion of Horribles,  or at least you assisted in Bruce's capture...  In restraining him.  

Jonathan Crane had injected Bruce repeatedly unaware of what he could unleash. When Bruce started laughing it unnerved everyone, echoing down the halls shortly before Jonathan protested and tried again, and again before giving up and trying to use the scythe to just kill him...You heard the sounds of a struggle, of whimpering and metal being dragged across metal, scratching on the floors, and fabric ripping.  The other members ran down the hall trying to  find, and deal with him. Bruce didn't say a word as he fought with all of them, knowing exactly how to hurt, how to disable their suits, their skills and their tricks as painfully as possible.

Taking their weapons and leaving them there. 

 Bruce took steps toward you as the light stopped working. 

When they finally flickered back on you saw the weapon in his hands and a smile on his face.  His pockets filled with their tools, and hands covered with their blood. 

"You asked for this...Your not getting what you deserved.. Gotham getting what it doesn't what no one does.'