The Lenexa, Kansas police department confirmed to KCTV5 today that they are investigating a shooting at a local Costco involving an off-duty police officer and an armed man. On Sunday afternoon, police received emergency calls that a man was threatening the store, pointing a gun at customers. But, when they arrived on the scene, the man was found dead. An off-duty police officer had shot and killed the suspect. The police did not release the name of the officer nor the deceased man. Witnesses described the scene. "You could hear from the front of the store," said one witness. "Was a bunch...