For years, there has been an effort to discover the exact origin of the most popular American grape variety and wine, Zinfandel. Thanks to modern technology, forensics, and DNA analysis, the collaboration between American and Croatian laboratories has born fruit: Zinfandel is the Croatian Crljenak Kaštelanski.

• Hrvatska Radiotelevizija
• Miljenko "Mike" Grgich
• Carole Meredith
• Ivan Pejić
• Edi Maletić