“Gov. Jerry Brown signed legislation on Sunday that limits who can be prosecuted for felony murder to those who commit or intend to commit a killing. The new law, which goes into effect on Jan. 1, scales back California’s current felony murder rule, which allows defendants to be convicted of first-degree murder if a victim dies during the commission of a felony — even if the defendant did not intend to kill, or did not know a homicide took place.”