証拠しょうこ隠滅いんめつ
shōkoimmetsu

Noun

1. destruction of evidence

Yojijukugo
Law
証拠しょうこ隠滅いんめつどーすんのよ!普通ふつう警察けいさつ連絡れんらくするもんでしょっ。
shōkoimmetsu dō sunnoyo! futsūwa kēsatsuni renraku suru monde sho'.
What does destroying evidence get you? The usual thing would be to contact the police, wouldn't it?