EDINBURG — In less than 24 hours, agents seized over 580 pounds of marijuana and more than eight pounds of cocaine. McAllen agents assigned to the All-Terrain Vehicle unit working in Hidalgo, Texas, observed several shoe prints north of the Rio Grande in an area commonly used by human and narcotic smugglers. Agents followed the shoe prints and discovered several bundles of marijuana in the brush. Moments later, an Air and Marine Operations air asset advised agents of multiple subjects swimming back to Mexico. Agents seized 31 bundles of marijuana weighing more than 488 pounds, worth more than $390K. That same evening,