系列杀人案件的特点体现在作案人的行为特征、作案人的个性特征和犯罪现场的痕迹物证三个方面。

Its characteristics are revealed in the suspects behavior pattern, personal character and trace evidence of a crime scene.

案件语言材料中出现的社会方言，常常能反映出作案人的社会特征。

The social dialects appearing in language materials of a case can always show the social properties of the offender.

10月3日晚上，决意要抓住扎胎人的高先生开始搬进车里守株待兔，终于在25日清晨与作案人碰面。

Determined to catch the vandal, he began sleeping in his car on the night of Oct. 3 and eventually confronted the tire slasher in the early morning of Oct. 25.