Final answer:
The high-voltage wires are not wrapped in insulating material, but they are held by insulating connectors, and techniques like neutral language questioning and blind photo lineups diminish witnesses' suggestibility.
Step-by-step explanation:
Controlling the scene and managing everyone in it, indeed requires cordoning off a section of the scene and having witnesses to wait there to maintain the integrity of the scene and evidence. This is a true statement as it ensures that investigators can conduct their work without interference and preserves the reliability of witnesses' accounts. In the context of the high-voltage wires question, it is false that these wires are wrapped in insulating material. While the high-voltage wires are indeed held aloft by insulating connectors to prevent them from grounding, they are not typically wrapped in insulating material due to the high-voltage. Lastly, making use of neutral language during questioning and implementing blind photo lineups are crucial methods to decrease the suggestibility of witnesses.