About one-third of the 18,000 police forces in the U.S. are using body cameras. The police-involved deaths of Michael Brown in Ferguson, Missouri, and Eric Garner in New York City have more departments scrambling to get this gear.
Locally, the Carlisle Police Department hopes to have its officers equipped with body cameras by the end of the year.
In Chicago, the nation's second-larges police force is testing 30 cameras in a pilot program.
Gaynor Hall travelled to Arizona to see how the Chicago Police Department's body cameras work -- and as she shows us, there's nothing simple about adding this equipment to the uniform.