on the morning of June 16th, he had picked up a call over the radio; that, in response to that call, he had made a quick run to the Colemont Apartments at 316 Norwalk Avenue; that he had entered the apartment and found therein a man in an unconscious condition; that he had summoned an ambulance and that the man had been removed; that, thereafter, the witness had remained in the apartment until a photographer had arrived and taken a photograph; until after fingerprint men had gone over the apartment looking for fingerprints; that no one, save the police, had entered the apartment from the time he arrived, that he had noticed a leather key container, in which were several keys, on the floor; that they lay slightly under the bed on the carpet; that he would know those keys if he saw them again! Three persons rode the flying carpet.