"Every day is like waking up everyday into a nightmare," Robert said.
The Mesa County Coroner publicly released the autopsy results Tuesday. The Mathenas don't agree with the coroner's decision to call the deaths accidental.
"How could it be an accident?" Robert said. "I don't understand it."
"It was a slap in the face," Diane said. "We expected more and we got nothing."
The boys died from hyperthermia after their mom, Heather Jensen, allegedly left them in her SUV with the heater blasting. According to a court record, the boys may have been unattended in the hot car for 90 minutes.
"We call them blanket fevers or coat fevers, where babies come in because they are bundled up," explained 9News Medical Reporter Dr. John Torres. "We have them take the bundles off and the fever goes down. The same thing is going to happen in the car where the temperature is high. They can't get the temperature down."
In the next week, the Mesa County District Attorney is expected to make a decision whether to file criminal charges against Heather Jensen. We asked a former Denver District Attorney Norm Early for his take on this unusual case.
"You have people who probably feel that her actions were absolutely abhorrent," Early said. "Does that make it criminal? You look at criminal statutes. Maybe manslaughter would fit. Certainly criminally negligent homicide would be one of the things you would consider."
(KUSA-TV © 2013 Multimedia Holdings Corporation)