It was a sleuthing job worthy of Batman himself.
And the winter coat carried into a movie theater in July proved to be the final clue that led to the arrest of a man secretly videotaping "The Dark Knight" in Lee's Summit last year.
On Wednesday, Robert L. Henderson, 42, of Grandview pleaded guilty in federal court to criminal copyright infringement. He faces up to five years in prison and must forfeit to the government his camera and computer equipment.
The investigation started after two employees of the Motion Picture Association of America discovered a pirated copy of "Hancock" online the day after its release.
A unique marker placed on each copy of a film allows the organization to track the theater in which it is being shown, according to court records.
That pirated copy of "Hancock" had been recorded at the Eastglen Theatre in Lee's Summit, the investigators determined. So they staked out the theater on July 18, 2008 -- the opening night of the Batman movie "The Dark Knight" -- and spotted Henderson carrying a heavy coat.
One investigator followed him into the theater and watched him set up a digital camera hidden under a piece of black cloth in the back row.
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