Fresno PD did say that all of the girls were taken at opportune moments, often the only time of day that they were left alone, meaning he stalks them before he kills them.
フレズノ警察は　犯人に都合のよい 少女達が一人になる数少ない機会を 狙って誘拐したもので 殺す前に被害者を ストーカーしていたとみています