1986 Miyata 310 12 Speed

What happened

I went to hear music at Millenium Park and my bike was stolen during this time. Both my wheels were locked to a rack with a new master U-lock. Nothing was left behind. I don't think anyone could have cut the lock because it was an especially busy area. I am confused as to how this could have happened. Are there master keys in circulation somewhere? If anyone has any information, please contact me.

Bike details

Type

Road Bike

Color

Blue

Size

21"

Condition

The bike is in decent condition considering its age. It is light blue with Scott aerobars added on. Toe clips. Rear rack. Foam grips on handlebars.

Serial #

Not sure

Theft circumstances

Date

Jul 28, 2010

Lock type

Newer U-Lock w/ Flat Key

Locked to

Locked to bike rack.

How locked

Locked through both wheels and frame to object.

How defeated

Lock is missing, along with the bike.

Duration

2 hours

Area

Other situation, please describe below.

Police report #

HS-437164