Maria “Mug Mouth” Magobet was caught after she stole some deli meat and tried to eat it:

Elmwood Place Police say they caught an alleged thief chewing……the evidence Saturday afternoon. Court records show Maria Magobet, 50, from Dayton allegedly ordered lunch meat and cheese from the deli counter at Valley Grocery on Vine Street, then walked out the store without paying. Police noted a pickle was recovered from Magobet before she left the store. When police caught up with Magobet, officers say they saw bits of lunch meat on Magobet’s mouth and shirt. Police also say she was still chewing and admitted to just eating some meat.  Magobet is charged with theft and attempted theft.

Her pug-mouth and fish lips would not let her hide the evidence.

Source