Revenge of Angela Lansbury

The smoking gun has a copy of the search warrant issued to gain access to one of the Duke Lacrosse player's apartments. He had sent a creepy email about getting off while killing strippers the night of the alleged rape, drawing suspicion on himself. In the warrant was a list of things that the police would be looking for. Item 8 is "copies of emails that have sentences punctuated with two periods." Now I'm no detective, but why would you limit yourself to sentences punctuated with two periods? I realize the original email had sentences with two periods, but why not get legal copies of all the emails? Maybe the guilt causing him to write a confessional email also drove him to atone for his grammatical sins by using correct punctuation, but the police would not be able to get it. Clearly, Murder She Wrote should be mandatory viewing in the police academy.