Does the federal government punish people for murder?

Economics Political Theory
1

If so, that power isn’t authorized in the constitution is it? So, can someone explain how they are able to do that?

thanks

2

Murder remains a matter of state law in the United States, except in rare cases where the Constitution actually does give the federal government jurisdiction (on the high seas, etc).

However, re: this:

Some people seem to think that the Constitution enforces itself. It doesn’t. Government officials who violate the Constitution aren’t struck down by the mighty, mystical power of a piece of paper signed a couple hundred years ago.