Senator Lindsey Graham was a probable witness for prosecutors pursuing a criminal case involving Donald Trump, former special counsel Jack Smith said, according to The Guardian.

Smith’s description was conditional. It identified Graham as someone prosecutors expected might give evidence, without establishing that the senator had testified or that his appearance had been formally scheduled. The supplied reporting does not explain what prosecutors wanted to ask Graham or identify the evidence he might have provided.

That distinction matters in describing the senator’s position. Being considered as a witness does not itself indicate that a person is suspected of wrongdoing. Witnesses can be called because they have relevant knowledge of conversations, documents or events that prosecutors or defence lawyers want a court to examine.

Smith also produced an investigative account spanning two volumes. In February, a federal judge imposed a permanent restriction preventing the Justice Department from making volume two public. The available account does not establish a connection between that disclosure ruling and Graham’s possible testimony.

How a potential witness becomes part of a case

In a federal criminal prosecution, investigators and lawyers may identify many people with information relevant to the allegations. That initial group is not necessarily the same as the witnesses who ultimately appear at trial. Decisions about whom to call depend on the issues being contested, the available evidence and the court’s rulings.

A subpoena is a legal means of requiring a person to attend and testify or produce specified materials. Receiving one does not establish criminal responsibility. A witness may also raise a recognised privilege or another legal objection, with disputes resolved through the applicable court process.

At trial, testimony is subject to rules governing relevance and admissibility. The opposing side generally has an opportunity to cross-examine a witness. Those procedures allow the parties to challenge recollections, question the basis of statements and test how testimony fits with other evidence.

Smith’s assessment therefore should not be read as a description of testimony already delivered. The supplied material provides no account of Graham’s anticipated answers and no basis for assigning him a particular position on the allegations against Trump.

Investigative reports and courtroom evidence

A special counsel is a prosecutor appointed within the Justice Department under a framework intended to provide a measure of independence in designated investigations. Under the department’s special counsel regulations, the counsel provides the attorney general with a confidential report explaining prosecution or declination decisions when the work concludes.

Such a report serves a different function from a trial. It records the prosecutor’s account and decisions; it is not itself a verdict. Public access to an investigative report is also a separate question from whether particular evidence can be introduced in court.

The restriction on Smith’s second volume concerns disclosure by the Justice Department. The supplied reporting does not explain the judge’s legal reasoning or establish what material the withheld volume contains about any particular person.

What to watch

Further reporting or public court records could clarify which proceeding Smith meant, what information Graham was expected to provide and the scope of the restriction on the second volume. Those details remain unspecified in the available account.