He could be Harker Rosalind's brother.  Harker could the little girl whose family was scammed by Jane's.  Dean Harken could be trying to track down Jane, and murder his family.  Harker rosalind could have became blind, because she was trying to get cured & Jane scammed her.  Harker Rosalind might be her real name, and Dean Harken changed his last name.  He is working for a security firm, so he could probably have friends in the FBI as well as the CBI.  The clue He is Mar . . . could have been HAR for Harken.