In the last two years, the state's Children's Administration has systematically destroyed more than 4,000 folders regarding its troubled child welfare system in Spokane – far more than had been previously acknowledged by top officials, according to documents released by the agency this month. The folders, which included both public and personal records of more than 1,700 Spokane children, as well as clues to the conduct of Washington's foster care system, likely represent only a fraction of the official documents destroyed statewide during the time period.