Bicycle detail

I went to work at ten o'clock am. Locked bike up across the street from where I work which would make it locked to the fence on the east side of Roosevelt High school, Just south of stairs. Came out to go home at a few minutes past four o'clock pm. Bike was gone. cable with lock was tossed on other side of fence. Unclear if they tossed my helmet over there as well due to me failing to check.