Polygraphs can be key to solving a case

I became hooked on my second day of work at the city's polygraph center.

A government department's safe had been emptied, and a preliminary investigation identified seven suspects working in its finance office. The building's security meant it was hard for nonemployees to enter.

Although the polygraph machines were similar with what I had used while studying clinical medicine at university, how the police collect and analyze data is very different.