His hands brushed over the mutant turtle by his side, his heart aching. Casey didn't know what it was or...where it came from.

Well, that part isn't exactly true. He knew where it came from.

And it came from watching Donatello fucking die.

Now....while April wasn't at fault, and it was the crystals doing...Casey still couldn't help be pissed at her, why couldn't she have been more careful? It didn't matter than she brought him back quickly, Donnie still had gone through such...such agony. Such...such pain. Donnie carried the scars now that Casey couldn't help but gently trace over as his friend slept, weak from the day and the resurgence.