Japanese with Manga
Learning through examples in 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.”