They were fatally shot less than 24 hours before their bodies were found, investigators said, according to the Journal-Sentinel.
"We can’t find any connection to this area other than possibly randomly driving out of the Twin Cities," Dunn County Sheriff Kevin Bygd said in a Tuesday news conference.
"We can’t find any connection to this area other than possibly randomly driving out of the Twin Cities."Â
Investigators also haven’t discovered a motive for the killing, which Bygd called a "mystery." He said it didn’t appear connected to drugs or organized crime, according to the Journal-Sentinel.
"It's highly unusual for this area," Bygd said, adding he’s never seen a quadruple homicide before
The SUV was driven into a cornfield off a rural road and abandoned before the suspects likely drove away in another vehicle, Bygd said, according to the Kansas City Star.
Pettus’ brother Zach Pettus said Sturm and Foreman had five children together, according to the Star Tribune of Minneapolis