Flashpoint (1984)

"They drink together. Work together. Party together. They live for trouble. Now they've uncovered a secret and their troubles are just beginning."

Two Texas border guards find a jeep buried in the desert, with a skeleton, a scoped rifle, and a box with $800,000 in cash. Before they decide whether to keep the money or report it, they privately investigate the clues and unravel a decades old mystery.