It's conceivable that some of these allegations are true, and there's no harm in checking them out, as long as the decedent's family agrees to participate.
( ( ( ( ( It ( ( 's conceivable ) ( that ( ( some ( of ( these allegations ) ) ) ( are true ) ) ) ) ) , ) and ) ( there ( ( ( 's ( ( no harm ) ( in ( ( checking them ) out ) ) ) ) , ) ( ( as long ) ( as ( ( ( the ( decedent 's ) ) family ) ( agrees ( to participate ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (PRP It)) (VP (VBZ 's) (ADJP (JJ conceivable)) (SBAR (IN that) (S (NP (NP (DT some)) (PP (IN of) (NP (DT these) (NNS allegations)))) (VP (VBP are) (ADJP (JJ true))))))) (, ,) (CC and) (S (NP (EX there)) (VP (VBZ 's) (NP (NP (DT no) (NN harm)) (PP (IN in) (S (VP (VBG checking) (NP (PRP them)) (PRT (RP out)))))) (, ,) (ADVP (ADVP (RB as) (RB long)) (SBAR (IN as) (S (NP (NP (DT the) (NN decedent) (POS 's)) (NN family)) (VP (VBZ agrees) (S (VP (TO to) (VP (VB participate)))))))))) (. .)))
None  of the allegations are true.
( ( None ( of ( the allegations ) ) ) ( ( are true ) . ) )
(ROOT (S (NP (NP (NN None)) (PP (IN of) (NP (DT the) (NNS allegations)))) (VP (VBP are) (ADJP (JJ true))) (. .)))