Everything said while true exempts* police officers. There has been several high profile examples of police abusing the system.
A police officer stole some weed on a border bust but was recorded by a dash cam. His sentence was enhanced because he had a gun he appealed the added 5 years but lost. In the almost same way (my analogy wasn't as close as I thought but I already wrote it)
The police can't use the database for private purposes. If they used a private service and paid that's OK.
http://www.tennessean.com/apps/pbcs....EWS02/80812101
The state trooper who fixed then-Deputy Gov. Dave Cooley’s speeding ticket is being investigated on allegations that he ran unauthorized criminal background checks on private citizens and state employees.

