Interim UW-Madison Chancellor David Ward is defending the university?s silence about an investigation involving a former top athletic official accused of misconduct. In a statement Wednesday, Ward said he understands the public has questions about what led to the investigation of John Chadima, who resigned as senior associate athletic director Friday, but he asked for patience as an independent panel reviews the matter. But not disclosing the nature of the allegations against Chadima allows for speculation, observers said.