From the Lubbock Police Department:

Benjamin Ray Mitchell is wanted by the U.S. Marshals for a parole violation and has an outstanding warrant for aggravated sexual assault of a child. 

Mitchell has brown hair and brown eyes, is approximately 160 pounds and 5'11"

Mitchell should be considered armed and dangerous. If he is seen, call 911. Anyone with information is encouraged to call Crime Line at 806-741-1000. Callers can remain anonymous and may be eligible for a cash reward.