Japanese with Manga

Lack of interest with 知ったことか

Grammar: Unsorted » 知ったことか

The expression 知ったことか implies a lack of interest in a thing.

“I have nothing to do with it.”

Examples

Don't care if it troubles you with 知ったことか

Manga panel from 三ツ星カラーズ showing example of Lack of interest with 知ったことか.
三ツ星カラーズ » Volume 1 » Page 138

Oyaji presented Colors with a bomb to defuse via a riddle, which led to problems for Officer Saitou. After Colors successfully defuses the bomb, Saitou tells Oyaji to stop playing bothersome games.

おやじ:
「子供(こども)のためだ。お前(まえ)が迷惑(めいわく)被(かうむ)ろうと知(し)ったことか」
“It's for the kids. I don't care if it will cause you trouble.”
Literal: “It's for the kids. Whether you suffer trouble or not, is that something I know?”

Nothing to do with Ayumu's situation with 知ったことか

Manga panel from それでも歩は寄せてくる showing example of Lack of interest with 知ったことか.
それでも歩は寄せてくる » Volume 2 » Page 97

Sakurako tells Takeru not to go to the shogi club as he’ll get in the way of Ayumu being with Urushi. However, as a new member of shogi club, and as a man, Takeru feels it’s his duty to show up.

タケル:
「歩(あゆむ)の事情(じじょう)など知(し)ったことか」
“This has nothing to do with Ayumu's situation.”
Literal: “Is Ayumu's situation or whatever something I know?”