Amendment 64 has allowed Coloradans greater recreation freedom when it comes to marijuana, even though it's still a controlled substance at the federal level. As is well known at this point, this has led to a number of challenges in the state. Colorado's position puts its new approach up against a black market that drives marijuana sales in other states. Many out of state residents have moved here and been arrested for large scale farms that take advantage of the situation.
Confirmation bias is the natural human tendency to selectively search out and believe data that confirms one's preconceptions. This type of cognitive bias can lead a person to ignore data that is inconsistent with or contradicts those preconceptions. Numerous studies have shown that confirmation bias is a major cause of false prosecutions and erroneous convictions.
The forensic techniques portrayed on crime shows such as "CSI" and "Forensic Files" may not be valid and reliable.