"Big Snake" in Indiana

From Mishawaka, Indiana:

"[It] all started three weeks ago when the Scott family found a mound of sand and gravel in their backyard.
"One member of the family even spotted what they thought was a huge snake head."

They called professionals, who said it might be a large exotic snake or a large native ratsnake. The problem, of course, is that large snakes don't create mounds of sand and gravel. They may take over a burrow, but this sounds like a misidentification, probably not a snake at all. (Offhand don't know if this part of Indiana has bullsnakes, but that would be more likely than a ratsnake.)