This is one of the "mug shots" of Rachel Respess. Along with her former colleague Shelley Dufresne, the two teachers from Destrehan High School in Destrehan, Louisiana were arrested on 30 September and 1 October respectively for alleged "carnal knowledge" with the same juvenile via a threesome (a then 16 year-old male student).
Her nonverbal signs in this moment are unusual - for Ms. Respess is suppressing a smile - during a mug shot. It is rather subtle and most people will misidentify this emotion (e.g., this is not contempt) or overlook it entirely. A smile, even a barely discernible one, in the context of a mug shot strongly suggests a sociopathic personality - or that she knows something we don't. In the second scenario in particular, such smiling out of context is a form of what Dr. Paul Ekman has termed, "Duping Delight".
Whenever you witness a smile which is incongruent with the emotional setting, you should always ask yourself, why? It may be nothing serious (e.g., a low consequence and humorous example of duping delight - and indeed comedians often use a deliberate form of this to engender smiling and laughing in their audiences) - however this is a question you should always endeavor to answer.
Nonverbal Communication Analysis No. 2971: Not Giving Good Actors an Easy Pass - Interstellar Trailer - When the Body Language is Not Congruent with Real Life
Nonverbal Communication Analysis No. 2855: Hillary Clinton, 2016 Presidential Race and Duping Delight
Nonverbal Communication Analysis No. 2497: Steve Carell, Graham Norton and Duping Delight Microexpression, Reminiscing about the Chest Waxing Scene from - The 40 Year Old Virgin
Nonverbal Communication Analysis No. 2050: George Zimmerman's Interview on Fox - Microexpression of Contempt and Duping Delight
Nonverbal Communication Analysis No. 2946: Barack Obama's 10 September 2014 ISIS Speech - Body Language Tells
Nonverbal Communication Analysis # 2322: Jeb Bush & Matt Lauer - Which one is the Narcissist? Body Language Red Flags
Nonverbal Communication Analysis No. 2691: Barbara Bush, "I Love Bill Clinton"