As someone that does expert witness work I am well familiar with the tactic lawyers go to make a point about the law. The reality is that any POTUS can't be indicted while in office regardless of what they did. The path for removal is impeachment and conviction in the Senate and anyone not suffering from TDS realizes that if a President killed someone it wouldn't even get that far as members of their own party would force them to resign.
And this law is very much needed for one simple reason. You could literally hobble a Presidency by allowing DA's indicting a President they opposed every other day. Once they leave office they can be indicted, tried and if convicted sent to prison. Just not while they are in office. Why do you think Hillary was so desparate to win?
Once again Archie, your govt school education system failed you in teaching basic civics. I would demand a refund.