Purpose: Heidegger’s philosophy of truth is a critical revelation concerning criminalization. The idea of truth has been a long series of debates among scholastic artworks since the idea of man’s interactions cannot be extrapolated to knowledge-seeking existence. Hence, evidence law, pertaining to types of killings, such as degrees of murder, with depraved heart killings of another, based on statutory codes and murder from common law jurisdiction, have elements for evaluation of its severity of criminal offense subject to punishment based on Model Penal Code. Although centuries have passed, erudite articulation of these issues led to development of questions, like ‘what are the elements of murder crucial for unlawful perpetration?’, ‘what are the arguments concerning exact copy of legal instruments?’ or ‘what must be the facts needed to make it essential for validity of measurement concerning crime perpetration of murder?’, for tools of becoming.
 Methodology: This article asserts that when the concept of truth, known as Aletheia (disclosure), is applied to criminal law, there must be three repercussions for this truth characterization. First, Aletheia is not restricted to propositions resulting to discovery of its various forms depicting Being-in-the-World. Second, the idea of truth does not only involve a substance for language and thought, but also exposure of factual materials. Lastly, Aletheia simultaneously reveals, and hides planned occasions constantly discussing that the truth is always a becoming process, a series of returning existence.
 Findings: Every discussion of truth in murder, under criminal law, has the tendency to create another intricate philosophical issue. The three exceptional principles of truth, namely, correspondence, coherence, and pragmatic theories, are deemed to be inadequate in resolving the questions on proof of facts as mentioned due to issue of existence.
 Recommendation: The theory of Heidegger suggests that we must rely on ancient Greek concept of ‘unconcealment.’ Upon this validation, this paper applies critical assessment to reveal the concept of truth, seeking justice based on proof of facts involving crime perpetration of murder constituting Heidegger’s opinions and judicial decisions. Heidegger’s truth is designed to Dasein (existence) as for being. The philosopher believes in the existence of truth due to exposure of its existence, hence, the Australian Legal System serves as the common ground in formulating laws based on legal theories as legislative framework pre-emptive to constitutional law towards application of its legal practice and regulatory policies to be in harmony set for amendments of constitutional gaps in terms of applying the critical assessment of Heidegger to other comparative laws based on political agendas for monetary success.