As well as Mr Kennedy, the officers include Mark Jacobs, who infiltrated a group of Welsh anarchists.

BBC: Undercover police damages cases to be heard in secret

The penultimate "American Mavericks" program, at Zankel Hall on March 29, will mark not only Mr. Jacobs's own Carnegie Hall debut, but the first organ concerto performance there since 1988.

WSJ: Paul Jacobs | Great Music Needs No Apology | Cultural Conversation by Barrymore Laurence Scherer

"Everyone knew who was going to take over, " says Mark Lieberman, who worked under Paul Jacobs a few years ago and is a fan.

FORBES: Cellular Scion