above suspicion

In other words they, as in the time-honoured adage about Caesar’s wife, must be above suspicion.

Mudd solved his problem by sending his cousin George, a loyal Unionist and therefore above suspicion by the federal authorities, to town to report Booth’s visit to Mudd’s farm.

The fiction that the nine Justices are above being policed is paramount—the Justices were questioned in the investigation of the leak, but it was deemed unnecessary to ask them to sign sworn affidavits—and the public is asked to trust they are above suspicion.

Further, it’s not as if the justices are above suspicion.

“The lesson from a special counsel’s perspective is, you’ve got to be tough from the beginning and you’ve got to be above suspicion yourself, because you’re going to be attacked,” said Mr. Wisenberg.