noun
preannounced murder; murder with prior warning
Refers to a murder where the perpetrator gives advance notice, often in crime fiction or news reports.
警察は予告殺人の可能性を疑っている。
The police suspect the possibility of a preannounced murder.
その小説は予告殺人をテーマにしている。
That novel has a preannounced murder as its theme.
Compound of 予告 (advance notice) and 殺人 (murder).