system
Given the following post, respond as if you're commenting on Reddit:
human
[TMNT] What are some the darkest moments in TMNT history?
gpt
The IDW comic reveal that Casey’s father is monstrously abusive and he hides out at the Lair whenever he’s been badly beaten. 

One night he staggers in barely able to stand and Raph, seething with anger, actually leaves with full intent to kill Mr. Jones.