Zaffirini & Castillo was founded by Carlos M. Zaffirini, Sr. in 1978. The firm engages primarily in civil litigation and is known for achieving the maximum results for its clients. It has been nationally recognized by the National Law Journal as one of the 50 Winningest Firms in the United States. The firm and its attorneys, have obtained the first multi-million dollar judgment in their hometown, Laredo, Webb County, Texas - $8,000,000 in 1975 (this case was subsequently settled for a lesser sum), as well as the largest verdict ever returned in Laredo - $108,000,000 in 2001 (this case was subsequently settled for a lesser sum by other counsel after the trial court granted a new trial).