supposedly over. how much money did he give anna? >> $46,000. >> reporter: $46,000? >> yes, sir. >> reporter: a man is gonna give $46,000 to a woman that he spends a lotta time with, works with, seems attracted to but there's nothin' goin' on between 'em? >> i think he's liking to pay, um -- to see the -- the happiness that -- that -- that it brings to people's life. >> reporter: anna used some of the money to bring her mother from russia for a visit and to pay igor's college expenses. and the cash kept flowing. the professor gave her another $6,000 just days before her murder. and almost all of this, like so much of anna's life, stayed on the down-low, at least with her friends. what could you tell about anna's relationship with john wirkowski? >> they were friends. very good friends. >> reporter: during the investigation it came out that john and anna had dated for a while. >> really?