Under current law, a defendant can be convicted of felony murder only if one of the following is true:
1. The person was the actual killer,
or
2. The person aided, abetted, counseled, or assisted the killer with intent to kill,
or
3. The person was a major participant in the underlying felony and acted with reckless indifference to human life
This “major participant + reckless indifference” standard is heavily litigated and highly fact-specific. Section 3 above is the source of an enormous amount of litigation, argument, and analysis. Many situations lend themselves to differing opinions as to whether a person was a “major” v. “minor participant in a felony. The question of whether a person was acting with “reckless indifference” isn’t exactly a cut-and-dry issue.
The remaining avenues to generate Felony-Murder liability for a defendant are based in context–so each case is different and each situation lends itself to new or competing analyses as to whether this rule can attach to person charged in a case.