1. A computer-implemented method for vehicle or entity tracking, the method comprising: receiving a first set of data, said data comprising video or images from a first mobile data source, determining that said first set of data matches a second set of data in a first data source, the second set of data corresponding to a vehicle or entity being tracked; requesting a third set of data, said data comprising video or images from a second mobile data source, and determining a confidence level based on how well said first and third data sets match said second data set.