Bicycle detail

I went into circle k on 19th and Northern. A man about over 6 feet with a beard longer than 4 inches (shaves it all off sometimes). wearing black shorts and a black shirt started at me. I walked in asked change for a $20. Couldn't do it so I bought 35 cent gum. Turning to see my bmx before paying it was there. 7 seconds later I walk out and see him riding off fast on his bmx with mine. I asked many people that know him for information. His street name is Nate but his real names brain, and he is very well known for stealing bmx stuff. He lives behind a closed Mitch mattress store that's bright yellow by where Dunlap and the I 17 freeway is. The problem is he's never really there. It is a very nice bmx he stole and along both purple rims say monster in big bold letters. My bmx has been seen but with a blue rim now and blue handle bars to.