. >> reporter: tony's attorney is bruce fleisher. >> they sought the death penalty. >> reporter: policetors were confident they had a solid case against tony villegas, but something happened that threw the whole investigation into freefall. that's because new crimes were about to be revealed. and new questions were about to be raised about who really killed melissa. and in the midst of it all, scott rothstein, like melissa, would disappear. >> coming up -- were melissa and scott rothstein's disappearances connected? >> we three kings be stealing the gold. >> the dark secret buried beneath all these rothstein riches. >> he said if i don't get this taken care of, somebody is going to put a bullet in my head. each day justin chooses to walk. at work... and after work. he does it all with dr. scholl's. only dr. scholl's has massaging gel insoles that provide all-day comfort. to keep him feeling more energized. dr. scholl's. born to move. ♪ happiness is powerful flea and tick protection from nexgard. a delicious chew that protects for an entire month. ask your vet for more information. repor