About that time, the two realized the house was on fire and fled.
“It was only a matter of minutes that the home was becoming fully engulfed,” Dauber said.
Bosco’s remains were found in the home’s basement after the fire was extinguished, state police have said.
Investigators “haven’t been able to determine the cause of death for Mr. Bosco, but they have been able to determine that his death preceded the fire,” Dauber said. “They know it was a matter of days. They can’t be specific at this point.”
At the start of the investigation, Dauber said, state police didn’t know that Debra Sundstrom was married, but upon discovering she was, they attempted to locate Randy Sundstrom so they could talk to him.
“Initially, we weren’t looking for his body,” Dauber said. “Initially, we were investigating the fire at the house, and one thing led to another.”
It soon developed that “it had been about 2010 when he was last seen,” he said.
“So we wound up looking into Debra Sundstrom’s residence.”
Investigators with cadaver-sniffing dogs located human remains Friday in a sealed 55-gallon drum in the back yard of the Sundstroms’ home at 1884 South River Road in Walton, Dauber said.
“Those human remains were later identified as ... belonging to Randy Sundstrom,” he said.
“He was never labeled as a missing person; he was never called in as a missing person,” the lieutenant added, saying that family members told investigators they had not had contact with him for “many years.”
Dauber said the investigation continues on several fronts, including mental histories, whether there was a history of domestic violence, the cause death for Bosco and Randy Sundstrom and Debra Sundstrom’s motive for killing the two men.
“Everything with her right now — actually all three subjects — is under investigation,” Dauber said. “We’re fielding a lot of phone calls, people who know all the people involved in this.”