US Drug Enforcement Administration Special Agent in Charge Javier Pena said today that the sweep was the result of a four-year investigation by the DEA and FBI into the notorious Mexican Mafia prison gang.
The arrests were made this morning in Laredo, with a couple addition ones in San Antonio and Austin. Officers with local police, sheriff's offices and the US Immigration and Customs Enforcement assisted in the arrests.
Some of those arrested were already in custody, but most were on the street. They were expected to make their initial appearances in federal court tomorrow.