presented to a jury, which ultimately found that sandy melgar murdered her husband. >> it's unusual, for sure, that we have a suspect that's like sandrabut that doesn't determine whether somebody commits a crime or not. >> reporter: but as far as lizz melgar is concerned, her father's killer is still out there. do you tell your kids about their grandfather? >> yeah. he would've loved them very much. it's just such a shame that he couldn't be here. >> reporter: bob ruff is determined to follow the trail wherever it leads. >> he's put in a lot of time and a lot of hard work. just really appreciative for everything he's done. because he's he's given us new hope. >> reporter: how far do you think he'll go? >> oh, he'll go all the way. he'll keep going until there's nothing else to look at. i know that she did not do this. i'm gonna continue to fight until we can prove that. >> as for now, i'm signing off. i'm bob ruff and this has been "truth and justice." >> bob ruff has raised $20,000 for a reward to find who he believes is the real killer. i'm amy robach. for all of us here at c, good n. >>110, aovehrgh ae a field at oakland airport.