Not proven (7)
(Other definitions for untried that I've seen before include "not yet proved reliable" , "inexperienced" , "Yet to be taken to court" , "Intrude, being not yet tested" , "Experimental" .)
(Other definitions for alleged that I've seen before include "Asserted - unproven" , "Made out" , "Purported" , "Declared but not proved; maintained" , "Asserted in court" .)