patrick.net

So it is in Rialto, Calif., where an entire police force is wearing so-called body-mounted cameras, no bigger than pagers, that record everything that transpires between officers and citizens. In the first year after the cameras' introduction, the use of force by officers declined 60%, and citizen complaints against police fell 88%.
....
One problem with the cameras, however, has been cost. Fortunately, fierce competition between the two most prominent vendors of the devices, Vievu LLC and Taser International Inc., TASR +7.69% which makes the cameras used by Rialto police, has driven the price of individual cameras down to between $300 and $400. Unfortunately, one place where expenses can mount is in the storage and management of the data they generate.

Both Taser and Vievu offer cloud-based storage systems for a monthly subscription fee. Think of it as an evidence room-as-a-service, where vendors are happy to see police departments outsource some of their most critical functions, and be subject to the same kind of vendor lock-in that can make corporate IT managers weary of the cloud.
...
The tragic irony is that police in Ferguson have a stock of body-worn cameras, but have yet to deploy them to officers.

Read more: http://online.wsj.com/articles/what-happens-when-police-officers-wear-body-cameras-1408320244