I have a question about speeding tickets

[Redskins8588]

My Uncle is a cop and this is comming from him. The radar guns are accurate with in +/-5mph of your speed. So to write you up a ticket for only going 5mph over rather than the 11mph over is insane, the cop is taking the time to write you the ticket so why not write you up for the additonal 6mph. Either way though, any cop that uses the radar gun has to be trained regularly on them, so if you do fight it I would request, which the police office has to give you, the calibration records for the gun and the officers that are currently trained on using the equipment....