answer: The police arrested #Person2# because #Person2# matched the description of a robbery suspect. #Person2# wants to take the police to court.
documents: #Person1#: What is your case against the police?
  #Person2#: They arrested me for nothing.
  #Person1#: What do you mean?
  #Person2#: They weren't supposed to arrest me.
  #Person1#: Didn't they let you go?
  #Person2#: They didn't let me go until the next morning.
  #Person1#: So they kept you at the station?
  #Person2#: They sure did.
  #Person1#: Did they tell you why they arrested you?
  #Person2#: I matched the description of a robbery suspect.
  #Person1#: I understand.
  #Person2#: I want to take them to court.