India, July 28 -- Authorities have revealed that Kristopher Karolkiewicz, who was found dead along with his wife and six children in a burning house in Michigan, is the suspect in the murder-suicide case. The 47-year-old allegedly murdered his wife, Mandy Karolkiewicz, 39, and their six children, before starting the fire in numerous places throughout the house. He died by suicide.

The children have not been named. Authorities said there were four boys aged 15, 12, 11 and 5 and two girls, both 11, per Fox News Digital. Two of the children were adopted.

"The cause and origin of the residential fire remains under investigation by Michigan State Police arson investigators. However, preliminary indications are that the fire was intentionally...