Family Dollar complaint: Unfair

Good evening,
I want to know who I can speak to in regards to bad experience I recently had. One of the cashiers was rude and accused me of stealing without any proof, she could have checked the cameras, cause its obvious everything would have been recorded. I was on my lunch break and decided to go shopping for several items I needed, I took my time because I was looking at medicines and was undecided on which one to buy. I went over to the register to pay for my items and thats how everything happened. The girl accused me that i had something inside my pants, my leg, which I didnt, I even showed her by lifting my pant. She laughed at me and made several remarks, sarcastic to the other cashier and they both laughed again at me. She then threatened me that she was going to call the police department so they can send an officer, to which I stated that I would wait there until a police officer arrived.
He later arrived, and not happy with the embarrassment that both cashiers put me through, I am the victim here and now they have made me feel like a criminal. I can’t even step again inside the store due to them putting a trespass against me.
I just hope this doesn’t happen to anyone else, because everything could have been avoided if they were to do their damn job right! I have never been accused of stealing, because I do not have the necessity to do so. This is so just unfair and I hope something gets done. Both cashiers work at the Family Dollar on Arkansas in Laredo Texas. Their names are Sesami Juarez and Samantha Tovar, worse cashiers ever!