Marcos Arrellano Zavala was 22 when he disappeared after a night at Esmerelda’s Bar in Willis, Texas. He was last seen on August 30, 1998, in the company of Guadalupe Lupe Pacheco and Pacheco’s adult sons, Luis and Juan Pacheco. Witnesses say they left together in a brown Chevrolet S-10 pickup truck.

The truck was recovered abandoned in Conroe several days later. A pool of blood found in the truck bed was DNA-tested and matched Zavala. The Pachecos are believed to have fled to Mexico after that night; neither they nor Zavala have been located and Zavala’s body has never been recovered. Authorities presume foul play and the case remains open.

Does anyone have information about Zavala, the brown S-10, or the Pachecos’ movements after August 30, 1998?