Most cars travel over Springfield's Memorial Bridge, but one car was floating under it on Wednesday.

The mystery in the Connecticut River was a submerged Toyota Avalon. The attention it drew, gawkers and all, backed up traffic for over an hour on the West Springfield side of the Memorial Bridge.

"We were really shocked," says Jennifer Shade, the witness who first spotted the car.

Police were shocked too. They sent out a raft to scope out the scene, then called on Red's Towing to get the car out of the water.

The towing crew needed all the strength it could to pull the 2 ton car out of the water.

Dripping with sludge, slime and sediment, the Avalon was unearthed trunk first for all to see.

"It wasn't here yesterday and we're wondering why it's here and how it got here," says witness Margarita Rivera.

The Avalon didn't fly off the rotary. The walls and the brush beneath it have been unscathed for months. Which to fire officials, means one thing---it floated down from upstream. Officials say they believe the stolen car was dumped at one of the accessible banks of the river in Chicopee.