Here's my take. The DOJ's case against the Minnesota shooter will go first-

[hlthe2b]

10. Even if he did pardon, State can still charge/try/convict. Double Jeopardy DOES NOT ATTACH under

the "dual sovereignty doctrine"-which recognizes that the federal government and each state government are separate and distinct sovereigns, each with its own laws and interests. Therefore, an act that violates both federal and state laws can be prosecuted by both jurisdictions without violating the constitutional protection against double jeopardy. SCOTUS has upheld the latter on multiple occasions, including fairly recently (2019 case of Gamble v US)