http://www.telegraphherald.com/ap/state/article_63eca404-a441-58e6-ac89-28f8884e559f.html#tncms-source=article-nav-next
“One passenger described a perilous journey that began in Mexico, telling investigators he and others crossed into the U.S. by raft, paying smugglers 12,500 Mexican pesos (about $700), an amount that also bought protection offered by the Zeta drug cartel.
They then walked until the next day and rode in a pickup truck to Laredo, where they were put aboard the tractor-trailer to be taken to San Antonio.”