you interview your primary target last, immediately before you indict him. Hopefully within a month.
“John Durham set to interview John Brennan: Report”
https://mobile.twitter.com/JasonMillerinDC/status/1291318394332106752
John Durham set to interview John Brennan: Report
https://www.washingtonexaminer.com/news/john-durham-set-to-interview-john-brennan-report