Patrick Harbron/HuluOnly Murders in the Building begins this week’s episode by confronting the fact that the details of the case are starting to resemble those of the first killing the central trio investigated. Charles’ (Steve Martin) love interest cannot be the murderer again. In the first season, Jan (Amy Ryan) was guilty. Now, everyone suspects his fiancée, Joy (Andrea Martin), may be a killer. But Charles persists: Joy is not another Jan.Charles is, however, having some doubts about marryin