Call it a lesson in progressive “good intentions.” Things always start out that way, don’t they? Take Minnesota’s overhaul of its felony murder statute. According to Minnesota Public Radio, under the old statute, “prosecutors could charge a person with aiding and abetting murder during the commission of an underlying felony no matter their role in that felony.” Hennepin County Attorney Mary Moriarty, a former public defender, was one of those who supported the overhaul. As MPR reported, “Moriarty noted that under the old felony murder law, a killer who signs a plea deal could wind up with a sh…