Shamrock is an American city in Texas.

In 1992, FBI Special Agents Mulder and Scully investigated a number of cases in which several people had been found dead, with two small bumps on their back and a strange substance in the tissue surrounding the spots. One of the victims had been found in Shamrock, Texas. However, Mulder and Scully chose to concentrate their efforts on researching a group of teenagers found in Bellefleur, Oregon. (TXF: "Pilot")

Mulder and Scully may have intended to travel to Shamrock, Texas after visiting Bellefleur. It seems unlikely that they did, however, as they reported back to Washington, D.C. just after investigating the case in Oregon.

See also: Shamrock Women's Prison

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