Driver of 18-Wheeler Tragically Killed After Falling Off Overpass. In the quiet hours of early morning in Raymondville, an isolated tragedy unfolded on FM 77. At about 5:20 a.m., a SAIA Motor Freight Line tractor-trailer was navigating southbound. But then, something went awry. Alejandro Delbosque Jr., a 61-year-old from Mission,…