Regarding a serious incident that suddenly occurred in a high-class residential area which is usually very quiet, the police began setting up a large-scale investigation net.
不祥事
ふしょうじ (fushōji)
N2
scandal, misconduct, unfortunate incident (often involving public disgrace)
その政治家は過去の不祥事により辞任を余儀なくされた。
That politician was forced to resign due to a past scandal.