When the immigrant first comes out of the water, he is shown running through dark, soggy beach sand, and he also falls on his hands and knees into the sand, scooping up two fistfuls of it. In the following shots of him running toward the road, his hands, knees, and feet are all clean.
In the slow motion shots of the Cuban being hurled through the air by the landmine explosion (in the teaser), the victim's feet are perfectly in order. In later shots, they are torn off at the ankles, while exposition in the post-mortem sequence tells us the COD is supposed to have been one his feet bones driven into his lungs by the explosive force.
Near the end of the episode, the CSIs use knowledge of AMV Theatre's use of cell-phone signal jamming equipment to locate an assassination target. However, FCC regulations make it illegal to operate such technology.