Mysterious Phone Calls Alert Police WEST CHESTER, Pa., July 28 WV-Chester County Dist. Atty. John E. Stively Jr. disclosed today that two mysterious phone calls had been received from Los Angeles in connection with the unsolved slaying of a Phoenixville Pa., girl. Stively said a man telephoned Chester authorities last February twice and stated: "I killed Marguerite Keota." County authorities recently started a new probe into the murder of the 22-year-old Keota girl, whose body was found in a water- filled pit near an abandoned school two miles south of Phoenixville j?n March 4, 1954. Medical examination indicated she was stabbed three times and may have been choked as well. The district attorney said the two telephone calls were made from a Los Angeles school "on the college level." Last week, he said two county police representatives went to the Pacific Coast city and brought back a list of 1.100 to 1,200 names of persons who may have made the calls. Stively said the list "has proved very helpful and we have turned up something which we feel is at least mildly helpful." No motive ever was determined for the crime. Stively said the first call from the Los Angeles school was a collect one and the second a pre-paid call. Local police at the time, he said, considered them "crackpot" calls but asked Los Angeles authorities to check on them anyway.