A Shreveport police officer apparently lost her department-issued weapon while helping other officers chase down a suspect during Saturday night's Krewe of Gemini parade. Officers were attempting to make an arrest in the 700 block of E. Kings Highway. The suspect led them on a foot chase, and an undercover officer -- who was on-duty working a plain-clothes vice detail -- helped chase him. But after getting the suspect to the command post on E. Kings, the officer found that her department-issued handgun was not in her holster. Police have been unable to locate the weapon. Contact them if you have any information that can help. Police Chief Willie Shaw has ordered an internal investigation to find out how this happened, and to determine whether any departmental policies were violated.