8 found dead in Michigan home fire; sister speaks on motive

Mandy Karolkiewicz, 39, Kris Karolkiewicz, 47, and their six children were found dead in a burning house in Grand Haven Township, Michigan.

Authorities are investigating the deaths as a potential murder-suicide, and some family members had gunshot wounds.

The fire is considered suspicious, and investigators are determining if it was intentionally set.

Mandy's sister, Molly Cessna, urged the public not to believe media theories and to wait for investigative results.