“Will serial killers go to heaven with no punishment if they believe in Jesus, repent and ask for forgiveness?”
The great King David once plotted the murder of his own faithful servant in order to cover up his adultery with the man’s wife. Yet upon his confession of guilt, Nathan the prophet told him frankly, “The Lord also has put away your sin.” David himself writes concerning that same incident, “a broken and contrite heart, O God, you will not despise”. That sounds like forgiveness to me. I think we’ll see David in heaven. In fact, I’m sure of it.
Admittedly, that doesn’t deal with the “serial” aspect, does it?