When comparing the cases, what similarities are there in the cases that suggest one person committed these murders?

The answer to the question could be:

There are some similarities between the facts within a murder that serve investigators to identify a murderer:

Explanation:

There is a common saying which says that "there is no perfect crime" and in most cases, it is usually true, people who commit heinous crimes such as murder regularly incur some practices or faults that are too common, with which investigators They can more easily find them.

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