minavar, it would seem was a serial rapist and illegal immigrant evading police for at least the past seven years. getting increasingly violent with each case over the years. so it s important we do apprehend him as soon as possible. again, you re confident this is going to happen? it will, yes. reporter: both investigators like their odds, between the feds and local authorities they say minavar s chances are slim. we ve had some tips come in. we re working on them. and we will find him. reporter: all from a whim on a 7-year-old case with a victim who has since died. a seemingly improbable outcome but one that carol s son says would close a painful chapter in his family s life. it still affects me. seeing him incarcerated would help? definitely, yeah. what would you say to him? i don t think it s a matter of what i would say to him. let me leave it at that. what i would like to see happen is him taken out of society forever. reporter: investigators bel