AdvertisementZombie 2nd mortgages are coming to life, threatening thousands of Americans' homes30:55Download AudioResumeUpdated May 18, 2024Chris ArnoldRobert SmithJess JiangSam Yellowhorse KeslerRobert BenincasaNick McMillanfacebookEmailKaren McDonough sits inside her home in Quincy, Massachusetts. (Vanessa Leroy for NPR)This article was originally published on May 10, 2024.