California Senator Dianne Feinstein called on the California Horse Racing Board to conduct a "thorough, transparent and independent investigation" into the death of GI Kentucky Derby winner Medina Spirit (Protonico) in a letter to CHRB Executive Director Scott Chaney sent from her office Monday. The letter reads: "As the California Horse Racing Board proceeds with the investigation into the jarring death of Medina Spirit, I urge you to ensure such efforts are thorough, transparent, and independent of any outside influence. Further, I ask that you provide my staff with regular...