Body-worn police cameras in Southern California 'cut complaints'
31 March 2014 Last updated at 12:42 BST
Next month the Met will be piloting 500 body-worn cameras with police officers on the beat in nine London boroughs.
If successful, it will be rolled out across Britain's biggest police force .
BBC London's home affairs correspondent Guy Smith went to Rialto in Southern California where they have carried out a pioneering experiment with officers wearing the body cameras for over a year.
The use of force there fell 60% and complaints against officers dropped by more than 80%.
Rialto Police Department's Chief Tony Farrar, Sgt Josh Lindsay and Corporal Gary Cunningham as well as Peter Bibring of American Civil Liberties Union talk about the scheme.