 Mallery countered in a letter of her own that the state police had allowed the board's investigators "three lengthy opportunities" to review the limousine and remained in regular contact with them over their findings.Silbaugh reiterated that the NTSB had been kept at a distance, and that Mallery had told her that even taking measurements and photographs could compromise the evidence without explaining how.A January 11 attempt to resolve differences via a conference call involving Bartlett and all the parties reportedly resulted in Mallery hanging up after 45 minutes.