They asked nicely at first.

After an Immigration and Customs Enforcement agent shot and killed Renee Good, a 37-year-old mother of three who’d recently moved to Minneapolis, local law enforcement officials requested a partnership with the federal government to investigate the case, as they’d done in past shootings involving federal agents.

When the Trump administration refused to cooperate, Minnesota prosecutors ratcheted up their efforts. They sent a series of strongly worded legal letters demanding evidence in the Good shooting as well as the shootings of Julio Cesar Sosa-Celis, a Venezuelan immigrant who was wounded a week after Good was shot, and Alex Pretti, who was killed on Jan. 24.

Still, the administration rebuffed the requests.

This week, prosecutors from Hennepin County and the state of Minnesota took the next step to force the Trump administration’s hand. They filed a federal lawsuit against the departments of Homeland Security and Justice over the evidence in the shootings, an action that Hennepin County Attorney Mary Moriarty, whose jurisdiction covers Minneapolis, characterized as “unprecedented in American history.”…