State police enforce state level laws, and Federal agencies enforce federal laws.
The whole semi-autonomous thing. If a state and the Feds both have their own laws against something they could each try to arrest somebody, but there could also be a situation where one might not have a law while the other one does. For example , weed is still illegal under Federal law. The Federal government has mostly chosen not to enforce these laws, but it could. Many states have legalized weed to varying degrees.
So there could be a situation where somebody is smoking weed in a state that has legalized it. The state police have no power to arrest that person, but the Feds do.
#8: Police
State police enforce state level laws, and Federal agencies enforce federal laws.
The whole semi-autonomous thing. If a state and the Feds both have their own laws against something they could each try to arrest somebody, but there could also be a situation where one might not have a law while the other one does. For example , weed is still illegal under Federal law. The Federal government has mostly chosen not to enforce these laws, but it could. Many states have legalized weed to varying degrees.
So there could be a situation where somebody is smoking weed in a state that has legalized it. The state police have no power to arrest that person, but the Feds do.
I’m sure this has all made it more confusing.