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CSI: 3 Dimensions of Murder Hints
How do I analyze the second set of items from Lucy's office?
1 of 4: That key looks a lot like the other key you have in inventory, and that's not just sloppy graphics.
2 of 4: Use the comparison microscope to compare this key with the one from Carrie's apartment.
3 of 4: The needles have an obvious blood stain on them; spray them with LCV, then swab and compare.
4 of 4: Finally, the box the needles were in has a fingerprint on the back. Use Ninhydrin to reveal it.