Riddle Riddle

I read this on Ghanaweb.

"As the Criminal Investigations Department (CID) and Attorney General close in on the circumstances under which forged invoices, fraudulent misrepresentation and other acts bordering on criminality came to characterize the dealings between the E.O. Group-Kosmos Energy in their operations in Ghana, a key suspect in the plot appears to have shown a clean pair of heels."


I need to go back to school or something because I had no idea that to show a clean pair of heels means to run away or disappear.