Amateurs and experts alike overestimate their ability to divine truth and deception. But when criminal investigators do it, it can be very bad news for the accused.
Experts find recurring themes in wrongful convictions. And while some jurisdictions are now creating in-house review units to ensure convictions are righteous, commonly repeated mistakes continue to mar cases.
The taser has proved a popular modern way to subdue a suspect, but in 1930s New York the men in blue were a little more shockingly hands-on in their approach.
In simpler times the mere presence of a home-built police scanner was lauded as a home course in law enforcement. But has Twitter killed the police radio star?