"Secondary characters are often used as red herrings. Though they might have a legitimate goal in the plot, they can also be set up to mislead the reader to link they have a part in the criminal action. Remember, a Red-Herring must always have some kind of motivation and opportunity. Suspense has to do with anticipation and expectation which helps create anxiety and tension.
"Examples of Red Herring Uses
- Distracting the main character
- Appearance of lending support but tendency to send momentum awry
- Get in the way of resolution intentionally or not
- Cause of new events though not always helpful towards solution" More