The Associated Press reports on a recent moonlit night, Border Patrol agents began rounding up eight immigrants hiding in and around a canal near the Rio Grande. A state trooper soon arrived to help. Then out of the darkness emerged seven more armed men in fatigues. Agents assumed the camouflaged crew that joined in pulling the immigrants from the canal's milky green waters was a tactical unit from the Texas Department of Public Safety. Only later did they learn that the men belonged to the Texas Militia, a group that dresses like a SWAT team and carries weapons but has no law-enforcement training or authority of any kind. The presence of armed militia members working on their own in a region known for human smuggling, drug smuggling and illegal immigration has added one more variable to an already complex and tense situation.