Right. That's what led to the federal civil rights charges against the four former Minnesota officers.
The indictment alleges that all four defendants saw Mr. Floyd lying on the ground in clear need of medical care and willfully failed to aid him. The indictment alleges that by doing so, all four defendants willfully deprived Mr. Floyd of his constitutional right not to be deprived of liberty without due process of law, which includes an arrestee’s right to be free from a police officer’s deliberate indifference to his serious medical needs. The indictment alleges that this offense resulted in bodily injury to, and the death of, Mr. Floyd.
Those are in addition to the state murder charges against the four.
My - guess - is that Derek will make a deal to testify at his upcoming federal civil rights trial ( he didn't at his state murder trial ) in exchange for being allowed to serve his time in a federal, rather than Minnesota, prison.