Unless you can predict the future, I doubt it will honestly come down to such a scenario!

[Of course there's no shortage of Templars around here in Skyhold but Alayre vehemently objects to them executing Cade. The Seeker, Malcolm, makes a good argument for a more 'permanent' solution but for Alayre, that's simply far too barbaric.]

Granted, Harimann hasn't exactly won himself any favors here but are we prepared to kill him for this transgression? If that is the case, then I know of many others who should've been hung for their past crimes.