(S (S (BASENP (NNS Police)) (VP (VP (VBD advised) (BASENP (NN media))) (SBAR (S (S (BASENP (DT the) (NN investigation)) (VP (VBZ is) (ADJP (JJ on-going)))) (CC and) (S (BASENP (JJR more) (NNS charges)) (VP (MD may) (VP (ADVP (RB still)) (VP (VB be) (VP (VBN filed)))))))))) (PERIOD .))