When Dario first came to Salem, played by another actor, he was a minor thief, stealing things to pawn, supposedly to raise money to hire a private eye to dig into the death of Arianna. Guess he thought his cop brother was not doing a thing. Melanie found him out, but did not squeal. Honestly, have no idea why he became the corporate exec. but he got sent off to Peru I think. ?? Yep, few years later, he showed up in CA, tending bar, different personality, but not the nasty, vicious, blackmailing man he is now.