"He sent the email to every lawyer representing a defendant in the Aryan Brotherhood federal case, and he said -- very short email -- that he was withdrawing for security reasons," Scardino told TPM.
Angela Dodge, spokeswoman for the U.S. attorney’s office in Houston, declined to confirm to The Huffington Post whether or why Hileman left the case.
"The case currently pending in the Southern District of Texas has been and will continue to be worked by the United States Attorney’s Office for the Southern District of Texas in partnership with the Department of Justice’s Criminal Division," Dodge said in an email.
The Associated Press reports that authorities are investigating whether white supremacists could be behind a recent spate of deadly violence directed at prosecutors and a Colorado corrections official.
Texas law enforcement agencies have been put on high alert, the AP reports.