It seems to be accepted that surveillance cameras help protect officers from false accusations, will help obtain convictions, and discourage attacks on LEOs, but the general trend is for Law Enforcement Unions and organizations to resist all attempts to make officers more accountable.
The Vievu LE2 is claimed to be the most widely used wearable police camera designed specifically for law enforcement. The LE2 easily clips to a police or security uniform to record the actions of the wearer and those around them.
The LE2 uses proprietary VERIPATROL
Source: debatepolitics.com