Kristopher Karolkiewicz lost his job at National American Heart Association just weeks before his killed his wife, Amanda “Mandy” Karolkiewicz, and their six children in an apparent murder-suicide. “The American Heart Association national headquarters is aware that one of its former staff members was among those who perished under tragic circumstances Friday in a western Michigan home. Kristopher Karolkiewicz was an employee of the American Heart Association from September of 2023 until earlier this month, July 2026, when his employment ended,” the organization said in a statement to Us on Tuesday, July 28. He did not work in the local Michigan offices or with the local Michigan operations of the Heart Association.” However, the American Heart Association confirmed to Us that Mandy was never employed by them.