This is probably "felony murder". The rule here is that if you are committing some kind of felony, and someone dies as a result, then you are guilty of murder for that person. This bypasses all of the usual intent filters between first degree murder, second degree murder, and manslaughter.

Classic example: you and a friend decide to hold up a bank. It goes sideways and a bank security guard shoots and kills your friend. You are guilty of murder because your friend died because you both decided to commit a felony.