Possible Clues:

• Such plates start to build one up
• Relating to the earth's crust and its movements
• Detective shot in the arm, causing upheavals?
• Pertaining to the structure or movement of the earth's crust
• Like some plates
• Busy investigating type of water associated with earth's crust
• Investigator shot in the arm is associated with global movement
• Concerned with construction, notice building around court
• Like some big plates
• Involving the movement of Earth's crust