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 .
Photos from miltary source show man wearing bib with Red Cross logo . Such misuse of symbol could be violation of Geneva Conventions . Expert says misuse of Red Cross emblem could endanger real aid workers . Colombia has denied using international symbols in its July 2 rescue ruse .