Remkus got the keys. He did not testify. It does not appear in the record that Esposito gave any keys to Lieutenant Remkus. As we have said, Esposito gave the keys to his chief of police, who also did not testify.We observe from a physical examination that each of these keys bears an identifying number.On a retrial of this case the handling of the keys allegedly thrown away by defendant should be traced by an unbroken chain of evidence.For the reasons herein stated, the judgment from which this appeal was taken is reversed and this cause is remanded for a new trial.Judgment reversed and cause remanded for a new trial.DUFFY, Circuit Judge (concurring in the result).Consistent with our decision in United States v. D'Antonio, 342 F.2d 666, we must hold that it was reversible error to permit the jury in this case, over the objections of the defendant, to separate during its deliberations.The trial of the instant case was prior to our decision in D'Antonio. Upon inquiry, the District Judge who presided in this case, learned that several of the District Judges in the Northern District of Illinois, Eastern Division, had adopted the practice of permitting a jury in a criminal case to disband for the night, after the case had been submitted to them by the Court.