Crime fiction, historical fiction, and other fiction that has characters reading newspaper articles as part of the story's plot run a high risk of making stylistic errors that can bounce a knowledgeable reader out of the story, much like a affixing a silencer to a revolver bounces out readers familiar with firearms.
Newspaper articles are typically written to conform to the dictates of the Associated Press Stylebook. Therefore, the author and the copyeditor should put down their copy of The Chicago Manual of Style when writing and editing sections of a story purported to be newspaper articles.
For example, a novel I am currently reading quotes a fictitious newspaper article from 2004 using the phrase "near Conroe, TX," immediately signaling to an astute reader that no real newspaper article is being quoted.
Texas is one of eight state names never abbreviated in a newspaper article, and no properly written newspaper article uses the two-letter USPS state postal code to refer to a state unless it is part of a complete mailing address that includes a ZIP code.
A writer who has never been a journalist might not know this, but no good copyeditor should be excused for allowing this error to pass into print. A good copyeditor knows which stylebook to follow and when.