Chords in this case file can be played in root position or in an inversion — the same three notes, but a different one on the bottom each time. A steady bass note holds down the true root underneath, so listen for the chord's colour, not just whichever note ends up on the bottom of the triad.
Reference the suspects before the case opens. Tap each one as many times as you like.
The same I, IV and V as the first game, but now the chords come in inversions. Students can't just follow the bass note any more. They have to listen to the whole chord.
Start here once students are getting the first Chord Detectives right most of the time. Playing a chord in root position and then its inversions on the piano beforehand helps a lot.