Actually, the question of first or second degree murder is interesting. If his plan was to abduct two victims, take them alive to the acreage, torture them (there seems to be evidence to support this), and murder them, then although he planned to murder them, he did not plan to murder them at the Liknes home. In fact, he could have changed his mind at any time after the abduction and left them alive, or the live victims could have been discovered on the acreage by his parents.
If the plan went South in the first few minutes of the kidnapping, then that may fall under second degree murder. He had no intention of murdering the victims in the Liknes home, and there was never a plan to harm Nathan. I suppose that is where the defence has room to make an argument for a lesser conviction and sentence.
The Crown may need to argue that all three victims were alive at the acreage in order to secure a first degree murder conviction, but I'm skeptical that this is possible ... we'll see.
If a person is murdered during the commission of a kidnapping or while unlawfully confined, that’s first degree murder – whether or not the perp intended to kill from the outset. If he went there to abduct/kidnap/confine, and they were killed in that process – that’s first degree murder – including Nathan.