I have always found Amarillo a bit shady, even in College I would avoid it when traveling from Oklahoma City to Denver. My buddy and I stayed at the Ritz in Amarillo (I don't believe it is open anymore) on our trip to ... somewhere? The desk attendant gave us the key to the room. When I opened the door, there was a woman sitting on the bed, nursing a baby. I closed the door immediately. We returned to the front desk and the guy said, "oh dang, she's still there, she was supposed to check out yesterday" and gave us another room. Apparently, they didn't do much when another guest checks out.
We still laugh about that. One of the more seedy places we have stayed, and believe me, we have stayed in some very seedy places. Fortunately, she didn't steal one of our bikes. We make it a point to stay in smaller towns now when traveling that direction.
Sorry about the bad luck, hopefully they at least make an attempt to catch these bastages. I wonder if they even know just how bad of a reputation Amarillo has?