AP: ... A park ranger found the duct tape while collecting trash Sunday on rocks at Boca Tortuga, an inlet in front of a series of caves, said National Park Ranger Service spokeswoman Dilma Arends.
Here is a snippet from an article on the same topic by Fox News:
... The foot-long locks were attached to a piece of duct tape in a remote part of the island territory known as Boca Tortuga. Police received an anonymous tip that led them to search the area. Sources on the scene said that the hair washed ashore and was found in a cave. Divers were reportedly dispatched the area to retrieve any other possible evidence. ...