its interesting that this is from the Philadelphia Inquirer. I wonder if any NYC newspapers covered it.. I have not found anything else.
08/17/57 Philadelphia Inquirer
N.Y. Girl's Death Tied To Boy's Slaying Here
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Similarity of circumstances surrounding the discovery of the body of a small girl in a secluded park in East Bronx, N.Y., and the murder of a young boy stuffed in a carton in Fox Chase eight months ago, launched a full-scale investigation yesterday by Philadelphia and New York police.
The two-state investigation was begun after the girl, about 5 years old, was found Wednesday in a lonely area of Rodman's Neck Park in the East Bronx.
The similarity between the death of the little girl and of the still unidentified boy in Fox Chase was noted immediately by Lt. David Brown, acting commander of the Philadelphia Homicide squad, who said a New York police teletype message seeking information on the girl's identity "immediately was placed in the file on the murdered boy."
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PLEDGES COOPERATION
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"We definitely intend to cooperate fully with New York detectives on this case" Brown said. He added that he was in telephone contact with homicide detectives there in an effort to run down any leads, which might develop, on either case.
In New York, Homicide Detective Harold Leahrer said police, as in the case of the Fox Chase boy, are "getting dozens of leads daily on possible identity of the girl." He, too, said he would remain in "close touch" with Philadelphia police on any developments pertinent to the two cases.
The girl's body was found in a woodland in the park. The body was wrapped in a white sleeveless undershirt with pieces of Army-type OD raincoat around it and tied with white cord. Several feet away was a torn blue canvas suitcase believed to have been used to transport the body.
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DEAD FIVE DAYS
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An autopsy yesterday revealed the girl apparently died of acute peritonitis caused after she swallowed a sharp object. Assistant Medical Examiner Henry Siegel said the girl apparently had been dead for about five days before she was found.
Brown said the similarity between the two cases was remarkable in that the Fox Chase boy also was undernourished, and was naked, except for being wrapped in a portion of blanket, when he was found February 26 in a cardboard carton.