In an effort to prevent false confessions, 18 states now require confessions to be electronically recorded. Either as a result of fear of a more severe punishment, the use of intimidation (real or perceived), stress or fatigue, among other reasons, some suspects confess to a crime that they did not commit. In order to prevent a not guilty suspect from being convicted, but also to assist law enforcement, the practice of recording interrogations has been implemented in states such as Colorado and Massachusetts.