Police science consists of three parts: police ideology, police art, and police technology.

警事学包括警事思想、警事学术和警事技术科学三个部分。

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Police science majors prepare for police and security work by learning about every aspect of police work.

这个专业学习警察工作的各个方面，以备将来从事警察等安全工作。

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The police investigation articles are documents recording and describing some practice in the police science or the research findings of certain investigations.

警学调研论文，是警察科学调查研究论文的简称，是记录、描述警察科学领域某个警务实践事实或某一课题调查研究结果的文献。

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And Delores Jones-Brown is a professor in the department of law and police science at John Jay College of Criminal Justice in New York.

NPR: The Difficulties Of Proving Racial Profiling

"Usually on the first hot night, people bust out, " said Walter Signorelli, a retired New York Police Department inspector who is now a professor of police science at John Jay College of Criminal Justice.

WSJ: New York City's Weekend of Violence Is an Exception

At his trial, Mr Hoey's barrister accused two officers of lying, the police and Forensic Science Service of slapdash storage and labelling of exhibits, and explained the presence of Mr Hoey's DNA through innocent contamination, for example through exhibits taken from Hoey's home.

BBC: Omagh: 10 years on