Billy Williams, 25, pleaded guilty last March, admitting that in October 2013, he possessed a homemade knife, commonly called a shank, while serving time at the Federal Correctional Institution at McDowell.
Senior U.S. District Judge David A. Faber imposed the sentence and ordered that it run consecutively to the 120-month sentence that Williams is already serving for, among other offenses, assault with intent to kill while armed.