The change is dramatically seen when Hamlet murders Polonius in Act 3, scene 4 in an attempt to defend himself from an "intruding fool"." Aside from the fact that Hamlet does not hesitate in his execution of Polonius, he also shows no signs of remorse. Hamlet disregards his religious beliefs by failing to give Polonius a proper Christian burial and instead choosing to hide his body. He makes a travesty of Polonius' death when asked where the body could be found. Hamlet ruefully responds with "At supper not where he eats, but where a is eaten"" (4.4.17, 19). The change is further established when Hamlet arranges for the deaths of Rosencrantz and Guildenstern. Again he does not hesitate, but rather acts in strategic manner, manipulating the use of his uncle's letter. It was deceitful and vein and such characteristics do not constitute for a morally conscious individual.
The next probable explanation for Hamlet's delay is that he questions the integrity of the ghost. Hamlet never doubts the existence of the ghost, not when his friends similarly witnessed the apparition; he only doubts its intentions. The doubt seems to be rooted in a common belief that ghosts were evil. Horatio demonstrates this point of view when he claims that spirits tempt humans and warns Hamlet: "What if it tempt you toward the flood, my lord, And there assume some other horrible form, Which might deprive your sovereignty of reason And draw you into madness"" (1.2.69-72). The warning foreshadows the brewing madness within Hamlet, but it also entitles Hamlet to some suspicion. .
The suspicion is again articulated by Hamlet himself when he questions the accusations condemning Claudius: "The spirit that I have seen may be a devil, and the devil hath power t'assume a pleasing shape.and perhaps abuses me to damn me " (2.2.528-534). Hamlet worries the ghost is raising false accusations as an effort to coerce him into committing a crime and rebuke him from his title as prince.