Images from miltary source show people wearing shirt with Red Cross emblem . Such misuse of symbol could be violation of Geneva Conventions . Expert said misuse of Red Cross emblem could endanger real aid workers . The bib bears the Red Cross symbol in the center of two black circles on a white background . Colombia has denied using international symbols in its July 2 rescue ruse .
Images from miltary source show people wearing shirt with Red Cross emblem . Such misuse of symbol could be violation of Geneva Conventions . Expert said misuse of Red Cross emblem could endanger real aid workers . Colombia has denied using international symbols in its July 2 rescue ruse .