Flock cameras are everywhere. Here's how they track cars.

Flock cameras read the license plates of all passing cars and then collect and store the data for future investigations. Mint Images RF/Getty Images Flock cameras read license plates and then collect and store the data for investigations. Critics say Flock's cameras enable mass surveillance and raise privacy and civil liberty concerns. Flock cameras can also misread plates, leading to wrongful detainment. Flock cameras are almost everywhere and often hide in plain sight. A Flock camera is a...