Experts have begun using radar to see what led to a 6-year-old boy being buried alive at Indiana Dunes.
The dune collapsed and buried Nathan Woessner under 11 feet of sand back on July 12.
Despite being buried for several hours, the boy survived.
Crews are expected to examine the site for at least two days and the dune will remain closed until it’s deemed safe.
“Think of it like an ultrasound but underground. It produces a series of images. We’re going to look at those images and we’ll be here as long as we’re needed,” said Francisco Arcaute, EPA Spokesman.
The park service says they’ve received reports of other holes in Lakeside Dunes over the past few weeks.