Hi this link says http://familymatters.wikia.com/wiki/Judy_Winslow

"If the show continued on into its final season, Judy would've attended Steve and Laura's fourth wedding and revealed she had been living with her aunt, Rachel, in Detroit. In her college years, she has attended and graduated from Harvard (a law school Laura dreamed of going). Now a District Attorney in Detroit, Judy helps with the most important cases and lowers crime"

What would have been the source of that info if true?

Person didn't give any link to sources, sounds like it's just someone's fan fiction.

Real or not, the concept of it all is very interesting.