Who was Redfox?

Colin Campbell, also known as Red Fox, Campbell is a leader of his clan which is an archrival of the Stewarts. He is given James Stewart's property and taxes the area for King George after the Rebellion. He is killed while talking to David in the woods by one who is affiliated with Alan's clan, likely a Cameron from Mamore. For this crime, Alan and David have to escape the law and James is later imprisoned.