GOLDEN, Colo (APt-Coro ner Ken Kayme of JeffersonCounty said Saturday that “all available evidence indicated that la-year-old Nlarilee Burtwas strangled.Kayme also said an autopsy showed the girl had been sexually assaultedWThe nude body of the Littleton girl was found Friday beneath a bridge in Deer CreekCanyon, west ot LittletonThe Coroner said an examination showed the girl had been struck on the head with somesort of heavy weapon, but the skull was not rractured Sheriff Hoy Vogt of Aiapahoc County said the girl a cheerleader at (i(»ddard Middle Senool at Littleton, had walked home with a girl friend after a basketball game ThursdayThe sheriff said Manlee tele phoned her mother. Mrs N Allen Burt, asking her to pick iter up But Vogt said Mrs Burt drove to the school instead Meanwhile, Iter dagger had begun walking tonne The family reported atr miss mg about 34 hours after she was last seen al n, the sheriff said