Impeachment is the right way to go. Jailing a sitting president could be disastrous, especially if it was done for purely political reasons. It must be a difficult process in order to prevent abuse. Arrest a president after leaving or removal from office if the crime is serious enough.
Presumably it would behoove the Congress impeach the President if he shot someone on 5th Avenue so that he could be arrested, however I believe impeachment still be difficult considering the negative political ramifications of turning on the leader of your party.
According to the arguments being made right now, Congress would have to act to remove him. Surely they would impeach a cold blooded murderer, right? I mean, I know the Democrats would have the moral clarity to impeach a murder, even if the president was from their own party. Republicans have morals too, right?
I doubt the R’s would. They’ve already proven themselves to be morally bankrupt.
I believe there is nothing in the Constitution that prevents a sitting President from being indicted and convicted of crimes. Just because the House can impeach and the Senate can convict to remove a sitting President - does not remove other legal means of removing a President from office.
That is just another method to remove a sitting President - but there still isn’t anything in the Constitution that precludes a criminal indictment from being issued.