This American Life is a class act at any time, but this recent episode is a must-listen. It is an investigative report into what happened to Richard G. Convertino, the Justice Department lawyer who prosecuted the ‘Detroit Sleeper Cell’ case.

Arrested only days after 9/11, the four men tried in the case were meant to have been planning an attack - two of the men were found guilty by a grand jury, only to have the Justice Department voluntarily asked the judge to throw out the case.

It was supposed to be the first terrorist attack planned from American soil. It was quite unusual behaviour for the department to not only throw out its own case, but then go after its own prosecutor.

The podcast considers whether the decision was taken as part of a vendetta against Richard G Convertino, the prosecutor, who repeatedly ruffled feathers, breaching protocol and failing to get along with his colleagues. But the Justice Department’s attempt to bring criminal charges against Covertino failed and he then he sued them.

All of this is fascinating, but more so are the couple of glimpses of the information at contest in the trial - for example, one piece of evidence was a home video shot at Disneyland. In the podcast, it becomes clear that there’s a section of this video filming a duck pond - the prosecutors argued that some singing translated to an anti-US screed - the defence said it was a song about ducks. (The podcast producers don’t get their own independent translation, sadly enough!)

The case rested heavily on some sketches in a day planner - which could be a map of a US air base in Turkey, or not.