Can't get address to serve someone papers (its been two years)

LOCATION: KY

my ex roommate stole like $4,000 from me, and I need an address to serve her papers. She obviously has refused to tell me her current address. I can't get it from her relatives either. I had paid for a sheriff to find her and serve her, but was told they couldn't find her (and I got charged anyway but that's besides the point). I ask my lawyer what I need to do and I share with him any info I get, but he just keeps saying "I need an address". I get it, but im obviously hitting a brick wall.

Wtf do I do next?