Policeman as 'PaP Traps . . Three men believed by the police1 to be desperate criminals are In the city., prisorr today , because the fourth of the quartet was not their pal as they thought, but & policeman disguised as a bandit. The men under arrest are Harold Cocke, Jack Gusgetto and Nathan Gold. The policeman who was arrested with them in order that they might not suspect a ruse is Traffic Officer Walter Garrett. Three weeks ago Garrett was detailed on the trail of hold-up men who had been perpetrating a serieB of daring robberies in the bay district. He decided to disguise himself as a desperado in order to get the evidence. Shortly afterward, according to his report, he met Cocke In a poolroom; Cocke, says Garrett, was reading an account of the holdup at the home of Michael Cianciarul-lo. at 314 Sheridan avenue, Piedmont, on Saturday night, December 2. "COPS" LAUGHED AT. "My attention was attracted to the man," said Garrett today, "when he read an article in the newspaper, began to laugh and then turned to a man sitting next to him and said: 'This is rich. The paper says the cops have fingerprints. I wore gloves on thla Job.'. "Immediately I made myself known to Cocke In my assumed character, and a couple of days later became so friendly that I was brought in touch with Gusgetto and began to lay plans for a holdup in which we three were to participate. "The holdup was scheduled for last night, and all the plans were made, but at the eleventh hour the two men backed out. "I got the word to the Central office that the stickup was not going according to plans, and they would have to make the pinch right away. The result was a raid on the poolroom where we were, at Eleventh and Washington, and the three of tis were arrested." The raid was conducted by Inspectors William Emigh, Joseph Robinson and Policeman D. C. Huge, who shortly afterward arrested Gold. Last night, the Quartet, Including the police officer, were treated alike, and the arresting officers set about to obtain confessions. Cocke is said to have admitted that he sold a quantity of furs to Gold, who, the poilco say, was he fence for the gang... At the time of his. arrest Gold had on his person a -watch,- the property of Policeman Garrett, which he had accepted from Garrett as stolen property, according to the officer's statement. Gold and Gusgetto refused to make statements last night and continued silent today. 15 ROBBERIES LISTED. From the statement about the furs the Oakland police notified tho Piedmont department, which had reported the loss of about $2000 in furs recently, and today Detective Fred Heere of that department announced that the descriptions of the men tally with those 'of the bandits who have perpetrated fifteen robberies in Piedmont In the last few weeks.. ... The specific case against' Cocke, who was turned over to the Piedmont, officers . this afternoon, - is that of the attempted robbery at the home of the Cianciarullos, . In Sheridan avenue.' Mrs. Ciancla-rullo today identified the hat and clothes of Cocke as the cunt worn by the robber who entered her bedroom and threatened her life. Mrs. Cianclarullo had grappled with the armed handlt and her screams frightened him away at the time of the intrusion. -According to Detective Heere, the furs said by Cocke to have been sold to Gold were taken from the home of D. D. Boyde, at 350 Mountain avenue. Other Piedmont residents robbed were Konrad Go-bel, 95 Arbor drive, who lost several hundred dollars in Jewelry; F. Gray, 131 Ramona avenue, from whose house $50 in currency was taken; Mrs. E. F. Pierce, 1010 Rose avenue, who lost Jewelry and cilver-ware; and Frank Krestan, of 10 Greenbank avenue, who lost $200 in Jewelry. The other homes listed by Detective Heere were entered, but nothing was taken. lt Is. 8lsQ..helieed bythe police. that Cocke and Gusgetto'were the men who robbed the guests at the party given by W. H. Metcalf, at his home, 629 Oakland avenue, on Tuesday night, -when $4000 in Jewelry was taken from the visitors. The records of the three men are being investigated by Detective Heere, Policeman Garrett and a detail from the local Inspectors' office. . ... .