You had gotten into a fight with foot clan, one of them cutting you across your right eye, leaving a vertical scar. Fast forward a few weeks after your accident, you were finally taking the bandage off your face, as Donnie pulled it off, you saw Raph stiffen, his eyes flicking over your scar, before yelling at you about you being just like someone else who had the same scar and was a murderer, he stared at you, a look of anger/fear(?), you stared back at him, you didn’t ask for this scar!