Michigan tragedy: mom and six kids killed in murder-suicide; motive remains unclear

Authorities say Amanda 'Mandy' Karolkiewicz and her six children were killed in a murder-suicide by her husband in Grand Haven Township; investigators are pursuing a motive as fires were set in the home, Mandy had discussed marriage struggles and infidelity online years earlier, and the family urges focusing on Mandy and the children’s lives rather than the deaths as they mourn.