That's what deputies - and a few St. Augustine residents - want to know.

How on earth did a dead shark end up in the parking lot outside the Walmart on U.S. 1 in St. Augustine last week?

The store's assistant manager, Amy, called the St. Johns County Sheriff's Office after employees found a rather large dead shark near an RV in their parking lot Friday afternoon.

The staff told Deputy Blake Gruny they didn't know what to do and didn't want to throw the thing in the trash.

"I observed a dead shark approximately 4 to 5 feet long in a shopping cart," Gruny wrote in his report. He called the offense a 'suspicious circumstance.' Good call, Gruny.

The deputy then got in touch with Florida Fish and Wildlife officers who came to take the shark for disposal.

Gruny went to the surveillance tapes to figure out who dropped off the rather large dead fish - but the cameras didn't show that part of the parking lot!

So then Gruny got in touch with the owner of the RV - a man from West Virginia trying to find work in Florida. The man told Gruny he heard noise outside of his RV early that morning - around 7:30 - but just assumed it was workers fiddling with carts in the parking lot.

Look at this shark! It's in a cart! And no one knows where it came from! Do you know? (Photo: SJSO)

The man told Gruny he went outside his RV a short time later and saw the dead shark on the hood of his RV. So the man from West Virginia plopped the shark on the RV and went to work.

His RV was none the worse for wear.

And Gruny? Well, the case is still open - and no one knows where the shark came from. At this point, it seems it will remain an unsolved mystery.