Final answer:
The person who takes the lead in directing the crime scene team is the Lead investigator.
Step-by-step explanation:
The person who takes the lead in directing the crime scene team upon arrival at a crime scene is the Lead investigator. The lead investigator is responsible for coordinating and overseeing the investigation, gathering evidence, and directing the work of the crime scene team. They are typically senior detectives or officers with extensive experience in criminal investigations.
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