吉祥寺の事件も、柏の事件も何らかの兆候があったに違いない

吉祥寺の事件も、柏の事件も何らかの兆候があったに違いない
事件は、突然起こるわけではない
兆候を見過ごさない、警察官の眼力が要求される
洞察力が要求される
As for the case of Kichijoji, as for the case of the oak, there must have been some kind of signs
The case does not happen suddenly
The power of observation of the police officer who does not overlook a sign is required
Insight is required