PoliceCall OffDunesSearch500 Volunteers Fail To FindjMissing Girl\ 6BY LYLE SUMERIX S*itk Berrien BftreanSAWYER - Organised search efforts to locate a six-year-old Chicago girl missing at Warren Dunes state park near here since Saturday afternoon were called off late yesterday by state police at New Buffalo, Police said they have no clues to the-whereabouts of-Cathy Davidson, tit but aeknowjedged that she may have drowned in Lake Michigan or may have been abducted The only potential lead police said is a pair of green panties which the girl’s parents, Mr, and Mrs, Robert Davidson, said were similar to a pair she had. However, police said the parents told them they would licit know whether they were Cathy’s until they returned home.•j.'.: /.: v.J. ?... aS.MISSING GIRL: Picture of Cathy Davidson, 6, Chicago, was shown visitors to Warren Dunes state park over weekend. Cathy disappeared late Saturday afternoon while at park with family. Holding picture is Henry Henni* of Fairplaiu, member of Berrien County Sheriff’s Emergency Patrol. (Staff photo).Dnwnoinp