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The 2 major stages of investigation process are: the preliminary investigation and the follow-up investigation.

1. Are the preliminary investigation and the follow-up investigation the 2 major stages of investigation process?

2. Are the 2 or 3 major stages of ınvestigation process?

3.What are the 2 major stages of ınvestigation process?

4. How many major stages of the investigation process are?

5.The 2 major stages of investigation process are: the preliminary investigation and the follow-up investigation, aren't they?