No, I highly doubt heroin was somehow featured in your Kratom. So in your words, you were "Walking around" and a police officer came up to you and said "I'm taking your Kratom because there might be heroin in it?" Farfetch'd tale dude, but we can discuss it. Kratom's current place in the licit/illict psychoactives market is its ability to skate laws in many instances while retaining opioid activity through it's active compounds. There's really no point to taint the product with a schedule 1.
The police are supposed to have probable cause in order to search you or your belongings, but have de facto ability to search you whenever they want, so nothing about this scenario, true or not should be surprising.
So true indeed. I have actually had cops plant drugs in my car. We were leaving a dopehole, went and used our gear and threw everything away. We were driving down the road and they pulled us over for going over the center line. We were merging onto the highway (thus traveling over the center line to merge into traffic)
They tore our car apart, I mean literally damaging it. All the while his partner was telling us that he hoped we ran. The cop pulled out a suspicious container I had never seen before. It had yellow baggies in it with residue. I get clear baggies from my dude. He charged us with it. While I was getting handcuffed, the overzealous cop smashed my face into the pavement. I wasn't resisting, I guess he just got his job satisfaction from hurting me. He kept saying stop resisting or I'll taze you. I mean his knee was in my back, and I had one arm behind my back, but he had my other arm pinned underneath me because I had tried to block my fall. Finally after some particularly brutal twisting of my arm he cuffed me. They cleaned the blood off my face before the mugshot, but my face is all swollen and there is obviously a big bruise right at my hairline. I have posted the pic before. They falsified statements because neither my friend nor I would talk, and they ended up forging our names on them. The two stories didn't match up because two separate cops wrote them. The signature didn't match my ID. Both our cases were dismissed. I really wanted to sue them, but my buddy couldn't get his cellphone out in time because the other cop had him cuffed and sitting on the bumper.
Moral of the story: Cops will lie in court. Cops will brutalize you for no reason, even if you are compliant just because they think you are a junkie. Cops will falsify evidence and statements.
Fortunately this happened just when the whole police malfeasance, brutality, and sexual abuse cases were just coming out in the paper in orlando. Mayor Buddy Dyer actually hired another lawyer on top of the cities legal department just to make sure the Orlando Sentinel didn't publish anything particularly damning.
to OP: Please keep your kratom at home. Though your situation was innocuous and did not deem a police officer causing you problems, just know that what happened to me can happen to you. I am even teaching my son that if you need help you call the paramedics, the fire department, even a known adult that you trust and myself and ex trust way before you ever decide to call police because the outcome will not be good. If you have a problem with someone, get a restraining order through court. The only time to call the cops is if your house or you has been robbed (which they won't solve, but you need a police report if you are going to claim it on renter's insurance) or there was a rape or murder. Everything else, you have a better chance as far away from the LE goonsquad as possible.