Key clues that led police to solve the murder of a Yale grad student included a green ink pen, a pair of boots, and a bloody sock. And a suspicious encounter with Raymond Clark involving a bloody box of “Wipe-Alls.”

The hunt for clues that led to the arrest of the alleged killer of Annie Le is detailed in a 13-page arrest warrant affidavit released to the public Friday morning after a two-month delay.

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