WICHITA, Kan. (AP) — A Texas man whose identity was stolen decades ago by a convicted child sex offender can’t keep a job, pay his bills or support his children.

But a case unfolding in Kansas is offering Marcus Calvillo hope of finally clearing his name, after federal prosecutors charged a Kansas inmate with assuming Calvillo’s entire persona.

Calvillo had tried for years to reclaim his name when he read an Associated Press story about an ID theft case involving a Houston teacher. He contacted the prosecutor involved, who calls Calvillo’s situation “especially horrible.”

The man using Calvillo’s identity had his first legal run-in as a teenager. His fingerprints, and subsequent convictions, became linked to Calvillo’s name.