An Oregon lawmaker called Tuesday for state and federal investigations into possible Medicaid fraud and state oversight failures at a Lake Oswego addiction treatment center. Diehl alleged the Lake Oswego halfway house was racked by crime and home to a person now charged with assault and attempted murder of a Washington woman. Most Medicaid payments in Oregon don’t come directly from the Oregon Health Authority but are authorized by a coordinated care organization such as Health Share of Oregon or Trillium Community Health Plan, which both oversee delivery of Medicaid services in Lake Oswego. In February, prosecutors in Seattle charged Kevin Daniel Sanabria Ojeda, 24, with kidnapping, robbery and attempted murder and said he lived at the halfway house in Lake Oswego. The Oregon Health Authority and Oregon Department of Justice’s Medicaid Fraud Unit did not immediately respond to questions for comment Tuesday.