侦查人员指的是对刑事案件行使侦查权的专门机关参与侦查活动的有关工作人员。其主要任务是围绕搜集证据，揭露和证实犯罪，查缉犯罪人，以及实施必要的强制措施这一总体任务，而进行的各种有机结合的职能活动。
侦查人员说他们没有寻找与案件有关的其他人员。
Detectives said they were not looking for anybody else in connection with the incident.
此案在审理时，侦查人员从火场型推断证明这次火灾系人为纵火。
But at his trial, investigators testified that based on the burn patterns in the house, the fire had been arson.
非法证据是侦查人员违反法律规定的程序或方法而获得的证据。
Unlawful evidence refers to the evidence obtained by the investigator while violating the due procedure or means.
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