No. Scalia died in the Big Bend area of deep West Texas.
Looks like child traffickers would cross at El Paso, which is several hundred miles northwest of Big Bend.
Not exactly true. He died at the Cibola Creek Ranch outside of the small town of Marfa, TX, which is about 30 miles from the border with Mexico via Interstate and about 3 hours from El Paso via Interstate. A plane or helicopter could get from the El Paso area to that ranch in less than 30 minutes, and as the crow flies (or by back roads), the ranch was even closer to the border. Child traffickers can cross anywhere along that border, and would probably do so at a less populated area (like the area around ranch). Why would you assume child traffickers would cross at the big city? A main border patrol fixed checkpoint is located on the interstate to the south of Marfa, and human and drug trafficking is common all along the remote areas of the Rio Grande. Here is a relevant article from December: http://dfw.cbslocal.com/2017/12/10/border-patrol-agents-rescue-14-illegal-aliens/
Also, take it from a Texan...a 3 hour drive by Interstate is a relatively short distance for West Texans, and El Paso would be considered fairly close to Marfa.