When I first started reading this, I thought it was a report about a speeding bicyclist. That seemed rather strange. However, there was more to it:
300 blk 6th St S: Officers observed bicyclist riding at high speed; attempted to stop him; suspect fled from officers; when officers apprehended suspect, he admitted bicycle was stolen (bicycle worth approximately $1200.): Arrested/FELONY THEFT/FLEEING OFFICER
I get the impression that the suspect wasn’t wearing attire you’d normally find on someone speeding on a $1200 bike.