The compact over which Texas sued New Mexico was first ratified by the three states' legislatures in 1939.
In a media appearance, Gov. Greg Abbott said Texas would hire border agents he believes were unfairly targeted by the investigation.
U.S. Customs and Border Protection has reported seizing 100,000 pounds of methamphetamine so far this Fiscal Year.
Evans entered the river to rescue two illegal aliens, who are now in custody and suspected of international drug trafficking.
Republicans have pressured Abbott to take more aggressive action against illegal immigration by challenging the federal government.
The number of border apprehensions decreased for a third month in a row in October.
As the Trump administration moves forward with border wall construction, eminent domain could mean a loss of land for some Texans.
As cartel violence in Mexico intensifies amid a continuing border crisis, Texas is likely to feel the consequences of these murderous turf wars.
