is lisa stasi's daughter alive?d harry smith say they know because they represent john robinson's younger brother, donald. >> is john robinson's brother, donald, the man who's been raising lisa stasi's daughter? >> yes. >> nbc news learned that tiffany stasi grew up here, in this chicago suburb, with a new name and a new identity. tiffany stasi is now known as heather robinson. since 1985, she'd lived believing she was john robinson's niece. authorities now allege that john robinson set up a phony adoption and scammed his own brother by pocketing thousands of dollars in phony legal fees. investigators say that on the night lisa stasi disappeared, john robinson gave baby tiffany to donald robinson and his wife, freida. unable to have children of their own, the couple says they were overjoyed with their new baby girl and had no idea john robinson had orchestrated an illegal adoption. >> the john robinson that don knew was a caring, nice brother. the john robinson that is coming out now is not at all the john robinson