Here's a Google search on the federalization of the sheriff's departments

http://www.google.com/search?hl=en&ei=9_SeSrGuH-KltgfGqb2KCQ&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=FEDERALIZATION+OF+LOCAL+SHERIFF%27S&spell=1&cts=1251931386760