Held at gunpoint by police (happy ending!)

This is one of those wrong place at the wrong time stories that was scary as hell when it was happening but now I can laugh about it and maybe learn a little something too.
I was at a local health food store sitting in the car waiting on my wife when a Sheriff's Office SUV went flying down the street, then moments later an unmarked police car went past and both of them stopped about half a block away. For a minute or so I thought that was the end of it, but a moment later a marked unit pulled up nearly in front of my car and a deputy got out, popped the trunk and pulled out an AR-15. Suddenly things were getting a little more interesting!
I got out of the car, partly to see what was happening, but also to alert my wife inside the store that she needed to finish shopping for her low fat prunes (or whatever the heck she wanted) and wrap up because it appeared there was some police action going on nearby. Being a newspaper reporter/editor for more than 30 years, my curiosity got the best of me and I went back outside to check out the action. Moments later I saw three deputies, all armed with AR-15s, walking nearly shoulder to shoulder and going around the side of a building that houses the Chamber of Commerce and our congressman's office, too. Now it was getting really interesting!!
I stuck my head back in the door of the business and my wife was checking out so I stepped out once again to see what has happening. Just then the original deputy came around the building I was standing at and pointed his rifle at me!!! Out of the corner of my eye a second deputy had come from the other direction and had unholstered his service revolver.
"Keep your hands where I can see them and get down on the ground," the deputy told me. At that point I was stunned. I tried to tell him my wife and I just arrived and she was shopping inside for prunes but he wasn't much interested. So down on the ground I went, arms out.
In a fit of somewhat panic I tried to tell him I had a concealed carry permit and I was carrying, but he apparently didn't hear me. He and the other deputy then walked up to me slowly and told me to keep my hands where they could see them and helped me up with hands firmly on my shoulders. He said, "I'll tell you what's going on in a moment. But first I need to know if you have any weapons."
Yes, I do, I told him. I was carrying my Glock 30 in a waistband Crossbreed holster. I also had a Smith and Wesson automatic knife in my weakside front pocket. I again told him I had a permit and he said, "I don't have a problem with people having guns as long as you have a permit. But we're going to remove it right now."
He then took the gun, holster and all, out of my pants and the knife too and told me not to move. Brother, I ain't moving an inch!
They then asked me a number of questions about a white Tahoe in the back of the building. They said they were responding to a report of a man holding a rifle near a small daycare center also in the rear of the building. The suspect was described a white male, wearing a red polo shirt, blue jeans and having salt and pepper hair. Just my luck I was wearing the same damn thing at that place at the WRONG DAMN TIME! I told him I was driving the white Camry and I didn't have any rifle with me.
After a few more questions the deputy then walked away and his partner stood there with me. I was never handcuffed or officially placed in custody, but out of an abundance of understandable caution they disarmed me. A few minutes later a third deputy holding a shotgun came over and said it appeared they found the suspect in the back and that I was going to be released. They handed me back my weapon and knife moments later, and again explained why they tool the action they did. Given the circumstances it was completely understandable and I have to admit I was very impressed by their calm demeanor and professionalism.
I had wondered since I began carrying what I would tell a law enforcement officer if I was stopped. Now I know. Next time though I hope it won't be while laying on my stomach in the middle of a parking lot!