The government's corruption case against now-retired Navy Adm. Robert Burke may be dealt a heavy blow in the coming weeks as lawyers for both the officer and the company he's alleged to have taken bribes from have filed motions to dismiss any evidence gathered from a key witness. The witness in question is a woman with whom Burke was having an affair and who, according to court filings, went to officials with the bribery allegations after their relationship ended. The filings argue that the