At half-past one o’clock on the morning of May 22d, Detectives Heidelberg and Dolan arrested Philip Emden of 414 West Thirty-ninth street, on the charge that he was an accomplice of Martin Kenkowsky. Emden was locked up in a cell at the Police Headquarters. In the morning, however, he was liberated. It was said that he was arraigned at the Jefferson Market Police Court and liberated; but on the other hand it was reported that he was not taken to court at all, but that Captain Washburn of the Twentieth Precinct called at headquarters, and that after a conversation the captain had with Inspector Byrnes, Emden was liberated. The police were reticent about the procedure, but the result was that Emden was freed. Capt. Washburn was indignant at Emden’s arrest. He said: “Emden was the first man to give a clue to Kenkowsky, and I promised to keep his name a secret. We are in the habit of taking informers’ names in confidence; otherwise people wouldn’t give us information. Prosecutor McGill also promised me that he would not disclose the name. I think Kenkowsky’s wife found out that Emden had given me information, and she tried, out of revenge, to throw suspicions on him. Emden has lived three years in the district, and is a quiet, well-behaved man. Chief Donovan was perfectly willing that Emden should be set at liberty. Emden will accompany me to testify at the inquest. He certainly has not behaved like a man who has committed a murder.” Philip Emden was found at his house, 414 West Thirty-ninth street. According to his statement he met Kenkowsky shortly after the latter came to this country. Emden is a mason, and found odd jobs for Kenkowsky, who is of the same trade. On Feb. 19 last Emden married Bertha Himmelsbach, and Kenkowsky was one of the witnesses to the ceremony, though on the certificate his name appears as Martin Karkowsky. Shortly after the marriage Emden was told by Kenkowsky that Mina Muller, a friend of his, knew Bertha Himmelsbach, who, she said, was a bad woman. This led to difficulties between Emden and his wife, which ended in their separation on April 17. Since that time he has seen very little of Kenkowsky, but he says that on one occasion the prisoner showed him a gold watch and chain corresponding to those owned by Mina Muller. Emden does not know whether this was before or after the murder.