>> reporter: yes. surprising? >> yes. very. i didn't know that. >> reporter: there were secret relationships that were known apparently only to her and maybe one other person. >> mm-hmm. >> reporter: it's like there were two annas or four annas. >> uh-huh. and i see where she's coming from, because, you know, i know our cultures are like that. i know that people don't share things. >> reporter: the professor explained anna was essentially his personal charity. the cops wondered about his motives. when a man who's interested in a woman basically bankrolls her, gives her 40-something thousand dollars and nothing happens, she's not interested in him, or she says, "you're too old," or you realize you're too old -- um, that can make some guys pretty angry? >> absolutely. obviously we needed to keep diggin'. >> reporter: the professor admits they dated briefly. i'm not sure what "dated" means, but i mean, is he some kind of sugar daddy?