Episode #3.5 - S3-E5
Character mistake: Fidel says that the victim "removed" the hard drive of his laptop, even pointing out an empty slot where the HD would be. During his massive overacting when he figures out of the solution of the case, Humphrey says that Jacob "wiped" the hard drive. (00:21:40 - 00:41:00)
Answer: There's probably no particular reason. Sets and props on long-running TV shows often change as needed and for various reasons throughout a series run.
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