He'd considered it his greatest failure, the day you died he'd considered giving up the cowl for good. But that would solve nothing, he ensured that the Joker was put away for good, he even designed the strongest metals in the world to specifically hold the joker. All because of what had happened to you, so when a new rogue appeared five years after your death he got to work.
Bruce spent months trying to track the red hood, following the bloody trail this mysterious anti-hero was leaving in his wake. If it even was a he, he could never get close enough to know for sure. One day he recieved a message with coordinates, which he followed to an abandoned apartment complex. The number should've set off alarm bells in his head the second he approached the door, Apartment 216. He stepped inside and he looked around the seemingly empty apartment before a gunshot rang out, glass shattered as the Red hood entered through the window. A modulated voice said,"Nice to see you followed instructions, Bats. Sorry for climbing in through the window dreadful ettiquite I know"
After a long and violent struggle Bruce finally got a hit in that cracked your helmet, he released an airborne tranquilizer gas which you tried to stop from entering your lungs by covering the crack in your helmet with your hands, murming repeatedly,"No..No no no no..."Until you passed out.
Bruce removed the rest of your helmet and froze as he saw the face of his supposedly dead former Robin. He called Nightwing for backup, he couldn't bear to even touch you. He had asked Alfred to run tests once he'd gotten you back to the cave, Bruce paced back and forth as he waited for confirmation. But deep in his gut he knew it was you.