Like @Daniel Sumner mentioned non-verbal techniques like maintaining eye contact, telling offenders to remember events in reverse order are used to detect deception.
Polygraph test is useful, but trained people can easily beat it. It also generate false positive results. So, it is not reliable.
Like @Daniel Sumner mentioned non-verbal techniques like maintaining eye contact, telling offenders to remember events in reverse order are used to detect deception.
Polygraph test is useful, but trained people can easily beat it. It also generate false positive results. So, it is not reliable.