What is the central idea of the article "Show Me the Evidence"? Investigative journalists can work undercover for months or years gathering evidence to expose corruption. To prove corruption, an investigative journalist must provide evidence so the perpetrators are held accountable. Anas Aremeyaw Anas, an undercover journalist in Ghana and sub-Saharan Africa, has exposed several corrupt acts. Anas won the U. S. State Department Hero Award in 2008 for his work on human trafficking.