That drawer was an unlocked one, as he had pointed out, and he submitted that there was no evidence to prove that it was the prisoner who had concealed the poison there. 
( ( ( ( ( ( That drawer ) ( ( ( was ( an ( unlocked one ) ) ) , ) ( as ( he ( had ( pointed out ) ) ) ) ) ) , ) and ) ( he ( submitted ( that ( there ( was ( no ( evidence ( to ( prove ( that ( it ( was ( ( the prisoner ) ( who ( had ( ( concealed ( the poison ) ) there ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (DT That) (NN drawer)) (VP (VBD was) (NP (DT an) (JJ unlocked) (NN one)) (, ,) (SBAR (IN as) (S (NP (PRP he)) (VP (VBD had) (VP (VBN pointed) (PRT (RP out)))))))) (, ,) (CC and) (S (NP (PRP he)) (VP (VBD submitted) (SBAR (IN that) (S (NP (EX there)) (VP (VBD was) (NP (DT no) (NN evidence) (S (VP (TO to) (VP (VB prove) (SBAR (IN that) (S (NP (PRP it)) (VP (VBD was) (NP (NP (DT the) (NN prisoner)) (SBAR (WHNP (WP who)) (S (VP (VBD had) (VP (VBN concealed) (NP (DT the) (NN poison)) (ADVP (RB there))))))))))))))))))) (. .)))
There was no evidence to suggest that the prisoner tried to hide the poison in the unlocked drawer.
( There ( ( was ( no ( evidence ( to ( suggest ( that ( ( the prisoner ) ( tried ( to ( hide ( ( the poison ) ( in ( the ( unlocked drawer ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBD was) (NP (DT no) (NN evidence) (S (VP (TO to) (VP (VB suggest) (SBAR (IN that) (S (NP (DT the) (NN prisoner)) (VP (VBD tried) (S (VP (TO to) (VP (VB hide) (NP (NP (DT the) (NN poison)) (PP (IN in) (NP (DT the) (JJ unlocked) (NN drawer))))))))))))))) (. .)))