Abstract Most certainly, a homicide investigation is a problem-solving event and requires tools and intelligence similar to most scientific research. A homicide investigation is the most rigorous application of the state’s police power. This paper examines the structural framework of these investigations, focusing on the psychological profile of the detective, the procedural utility of the "Murder Manual" and "Murder Book," and the taxonomy of investigative problems. This essay is about solving a murder, though by synthesizing these theories with the 2026 Nancy Guthrie abduction/presumptive homicide case in Arizona, it illustrates the shift from physical evidence to "digital and medical absence" as an essential tool for prosecution in "no-body" cases. Here is a table of contents for this essay. 1. The Homicide Detective 2. The Murder Book and Murder Manual 3. The Complexity of Homicide 4. ...
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