at age 49, peterson married 19-year-old hotel receptionist stacy ann cales (born january 20, 1984 in downers grove, illinois) on october 18, 2003, and she subsequently changed her last name to peterson. together they had two children, anthony (born 2003) and lacy (born 2005). stacy legally adopted savio's children, and treated them like they were her own. she was close to completing her nursing degree from joliet junior college at the time of her disappearance on sunday, october 28, 2007. stacy was officially reported missing in the early hours of monday, october 29, after her sister, cassandra cales, failed to hear from her when expected. peterson claims that stacy called him at 9 p.m. on sunday to tell him that she had left him for another man and that she had left her 2002 pontiac grand am at bolingbrook's clow international airport. stacy is still considered a missing person. her family has launched a website to help find her.