The strychnine had been found in a drawer in the prisoner's room. 
( ( The strychnine ) ( ( had ( been ( found ( in ( ( a drawer ) ( in ( ( the ( prisoner 's ) ) room ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN strychnine)) (VP (VBD had) (VP (VBN been) (VP (VBN found) (PP (IN in) (NP (NP (DT a) (NN drawer)) (PP (IN in) (NP (NP (DT the) (NN prisoner) (POS 's)) (NN room)))))))) (. .)))
There is a drawer in the prisoner's quarters. 
( There ( ( is ( ( a drawer ) ( in ( ( the ( prisoner 's ) ) quarters ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBZ is) (NP (NP (DT a) (NN drawer)) (PP (IN in) (NP (NP (DT the) (NN prisoner) (POS 's)) (NNS quarters))))) (. .)))