Bicycle detail

I was involved in a biking accident on 10/22 at 6:40PM involving a vehicle on the corner of Concord Sq and Columbus Ave - a nearby citizen/pedestrian had helped me up from the ground and had also placed my bike and locked it on the silver pole (assuming was an old stop sign) on the side of the street in front of apartment/address 53 Concord Square. I was sent to the hospital immediately after due to my injuries and was unable to come retrieve the locked bike until the following Sunday evening (10/24). When I came to the scene of the accident in hopes of retrieving my undamaged bike - it was not there. The man that locked the bike either did it incorrectly and someone else stole it over the weekend - or the man intentionally didn't lock it properly and took it upon himself to steal my bike. This is a brand new bike that was purchased about 2 weeks ago.