Crime Alert. I'm Nancy Grace, breaking crime news now. Information continues to unfold in the death of Clint and Kristen Brink.

The mom and dad who died fighting off an assailant in Devil's Den Park, protecting their two little girls ages 7 and 9.

Jennifer Gould has the details. Nancy, a gruesome double murder at Arkansas's

Devil Den State Park has unleashed a terrifying new investigation with authorities now probing if the

killer is linked to a chilling unsolved case with eerie similarities, including potential satanic ties.

Andrew McGahn. A 28-year-old former teacher is in custody for the brutal stabbing deaths of

Clinton Brink 43 and Kristen Brink 41. Here's Arkansas State Police Colonel Mike Hager at a previous news conference.

What we know right now, we have no indication to suggest that the girls were his target.

And I can't tell you that we have no reason to believe that there was any known association

between our suspects and our victims.

But authorities now fear he may be a serial predator stalking America's remote parklands.

The horror unfolded on July 26th when the Brinks were viciously attacked while hiking with their two young daughters, aged 7 and 9.

The couple died, shielding their children who escaped unharmed and are now with family.

Arkansas State Police acted fast, swiftly identifying McGahn, a Springdale resident after DNA evidence,

found at the crime scene matched his profile.

McGahn was nabbed on July 30th at a barber's shop mid-trim.

He faces two counts of capital murder,

with prosecutors vowing to pursue the death penalty.

But the case took a darker turn

when investigators began digging into a possible connection to the 2020

unsolved murder of John Schmutzer at Wisconsin's Devil's Lake State Park. Here's an official at the

news conference. We just simply think that he was in the wrong place at the wrong time. He was

...