Why pursue state charges for Vance Boelter when he's already been convicted in federal court?

A convicted political assassin will have his day in court, again.Vance Boelter is already serving a federal life sentence for the attack on Minnesota lawmakers that killed House Speaker Melissa Hortman and her husband Mark. It's the same sentence he'd receive if convicted on state charges.So why bother pursuing state charges? Good Question."There are a couple different reasons why you might," said Rachel Moran, professor at the University of St. Thomas School of Law. "One is just the belief that the state has a responsibility to prosecute serious crimes, and irrespective of whether the federal government already has, it's something the state should do."Another reason is to protect against changes in a federal conviction. Moran said hypothetically Boelter could have a successful appeal in the federal case. "You could still potentially have a state conviction to ensure he would remain incarcerated," she said.There's also the possibility of pardon. The president of the United States can p