Manga Crime-Digging Brother
Guilty Brother / Wā Zuì Xiǎo Lǎodì / 挖罪小老弟

Summary Crime-Digging Brother
Jiang Peng, a prison guard, was suspended from pay, when a yellow porn magazine was confiscated from prison. The prisoner hanged himself. The yellow magazine contained a notebook full of unrecognized criminal records. Based on these criminal records, Jiang Peng made a visit and uncovered one by one mangakakalot.lol