有殺錯冇放過 [－杀错－－过]

Jyutping jau5 saat3 co3 mou5 fong3 gwo3
Pinyin yǒu shā cuò mǎo fàng guò

Definitions (Wiktionary)
  1. phrase, Cantonese, idiomatic
    to rather kill the innocent than let go of anyone guilty or an intended target
Definitions (Kaifangcidian)
  1. 寧枉勿縱 – 宁枉勿纵