How a i can report a persecutors harrasment that just turn a whim for them?

this start about 2 years ago when they arrest my brother in law, i was living with my sister but my brother in law was arrested because selling drugs let me tell you thats when start my nightmare they start to persecuted me everywhere i go if i sell grugs too buy i was not what they think, then they found where i work then they try to make look bad, they spread a rumor that i spit in the food then somepeople that knows me start to asking me saying me dont spit in my food im your friend and that make feel bad how could belive such thing.then every where i go they follow me i go to bestbuy or sears they make look bad as im a thif i go to restaurants they said im who spit in the food in my workplace, but thanks God im not does things but now i feel treathened me and my family security, they got pist because im not what they though they said it was a waste of time but now they put people to provoque me following everywhere i go in their cars, in the place i work this people are pointing me whispering each other now they are framing me for x reason all this its very strange and this is for about 2 years almost somthng its rong and twisted,,, im not very importan im avarage guy but there its a customer and there friends are old but they were cops before now they are retired but one of them when i start to work right there this guy dont like me,thing that i dont care wether like me or not. i think this guy have something to do with this thing what still going on against me because i have seen this guy with strage people pointing me and talking laughing of what can happen to me inside jail... moquin at me now my life its work and home ,home and work so im trying to go a side, but they still have people strangers that provoquing me they yield,stearing at me and i want to stop this, well im mexican and they are using the law to plot against me i have being frame me and my family i said family because i live with my mother, my sister, an i have a brother that live with a lady i im afraid they will go againt my family because they are using strange people to threatened me and my family im tired of this i feel like im in a twilight when all the world its pointing you when you no even know why because im no use drugs, i dont even drink, dont smoke dont like coke or any kind of soda dont like to party im a type like to fight, but they have call me smart,pease of ****,s,smartdog,demon,wolf, they have call a lot of thinks, but they saids other guys run but this one stand still, and that make me feel they are trying to acuse me of somethig thing that they only know, i have never being in jail nither being a gang member because i like my family where i live and i love my self....i proud who im ,no matter im poor in this country but happy with i just have. and once there was a guy old guy with the aparience of important with a despot look, that guy call me insolent to because i ask to give me a apology of what they have done before like call me thif o crook trying to make look as a criminal, non of them have stand in front of me to give me an apology but not, they have call me insolent because they have power, a little power that meltdow feelings of human dignity. please to who i have to go please, or what i can do because they are a thread to me and my family because something its wrong is happening .....and i want to stop it...