犯はん行こう声せい明めい文ぶん

noun

letter of responsibility for a crime; criminal manifesto

A written statement issued by a perpetrator or group claiming responsibility for a crime, often sent to media or police.

• 犯はん行こう声せい明めい文ぶんが報ほう道どう機き関かんに送おくりつけられた。

  A letter claiming responsibility for the crime was sent to the news media.