The FBI? Yeah, I'm sure they'll get right on that.
Don't know about Arkansas, but in my state, you do NOT have the right to see the radar unit. Period. If you are pulled over for a misdemeanor offense, you would be required to sign the summons and promise to appear in court. If you refused to sign, you would be arrested and booked into jail for the offense.
It's been my experience that southern states take speeding a little more seriously than up here in the midwest. Here in Indiana, you cannot be arrested for speeding. (Unless you are going WAY over the limit, which gets into the offense of "reckless driving") Speeding is an infraction, you are simply issued a ticket, and you don't have to sign it. You can either pay it, go to court, or ignore it. If you ignore it, your license gets suspended. That's it. No warrant, no jail. You just have to pay the ticket (and exorbitant reinstatement fees) to get your license back.
In some states, speeding is still considered a criminal offense (misdemeanor), not a simple infraction. You can go to jail for a misdemeanor. Again, I'm not familiar with Arkansas law, except that it seems that speeding is a misdemeanor there. I would imagine that you were handcuffed and taken to the station for demanding to see the radar, then refusing to sign the ticket. I'm betting that this is well within the scope of the trooper's duties.
Your best bet is to make a complaint to the trooper's Internal Affairs division. The FBI and the ACLU do not have time to deal with a rudeness complaint.
I don't know an officer that I've ever worked with who would NOT lock up somebody who wanted to argue on the side of the road and refused to sign a summons.
In short:
1. You argued and refused to sign the ticket.
2. The side of the road is not traffic court.
3. You were taken into custody after refusing to sign the ticket.
4. Your van was searched properly, incident to arrest.
5. You were transported to the station in handcuffs, also proper.
6. Police are not required to read you your rights (Miranda warning) unless you are being detained and questioned regarding the offense which is being investigated. The trooper likely doesn't need any of your statements to use against you. It's a speeding offense, not the Kennedy assassination.
7. Finally, at the station, you did what you should have done on the roadside....sign the ticket and fight it later, or pay the fine.
8. The police don't owe you a ride to the tow lot after you refuse to cooperate.
9. The radar gun said "58." Please provide your certification in traffic radar to prove that you are qualified to interpret the display on a certain piece of radar equipment. Many radar guns list the target speed and the patrol car speed. There is a good chance that you really don't know what you are talking about. If the police have to be certified to interpret radar unit results, why don't you?
The ONLY issues I see with the trooper:
1. He was rude and overbearing. (If your characterization is accurate) Troopers shouldn't be rude, but this is not an FBI matter. It's a matter for his department's IA division. Your complaint alone will not cause any adverse action against him, but if he's had similar complaints before, the department can't ignore a pattern of behavior.
2. He threatened to take your CHL. Check into Arkansas state law for valid reasons for revoking your CHL. Revocation for a misdemeanor traffic offense seems harsh, but it might be that way. Know the law before you include this in your complaint.
By the way, I doubt you'd have gotten a warmer reception to arguing with the Polizei on the side of the road in Germany.