It's on the podcast 5-4, which is about - in their words - "how much the supreme court sucks"

The hosts are sorta corny but also funny and super sharp. I recommend it in general, but this week's ep "Tison v Arizona" is about exactly this subject, felony murder. i.e. whether someone at the scene of a murder, but who didn't take part, should be held liable (and specifically in the Tison case, whether or not they should be able to be put to death for it).