Elkins collected a cigarette butt from Mann , who was serving time at the same prison , and provided it to his defense attorney for testing .
She eventually identified Johnson 's next door neighbor , Earl Mann , a convicted sex offender , as a likely suspect .
Elkins collected a cigarette butt from sex offender , who was serving time at the same prison , and provided it to his defense attorney for testing .
She eventually identified Johnson 's next door neighbor , Earl Mann , a convicted sex offender , as a likely suspect .