I keep trying to put myself in the shoes of a hypothetical MS who was not involved in this plan...
... so heres this guy who I love like a brother and live with but is always coming up with harebrained schemes, many of which involve illegal activities but nothing to this point that makes me think hell murder anyone. Okay fine. And friend tells me hes getting an incinerator. And that its for garbage. Oh no wait, Im texting him about bones and testing it out on dogs, so if youre still giving me the benefit of doubt maybe Im just a creep that hurts animals but as far as I know, no murder involved! And I help this guy get in touch with a guy who sells guns who I know from elementary school. But if youre still giving me the benefit of the doubt, maybe he needs it to kill said dog or those pesky deer (handgun? Interesting choice. But I dont question it in this hypothetical) on his property...
Then at some point this friend tells me he killed a girl. And none of my texts after that point reveal any surprise, discomfort or worry. Oh you rolled your first spliff, friend who I had no idea was going to murder anyone? Cool. How is the spliff? No its okay, my gf can just wait in the car while were talking to that girl, if you know what I mean. And then Ill make a rap for this.
He helped test the incinerator, he hooked him up with a gun guy, and at no point when his buddy murdered someone did he express any surprise, it was just casually talked about like it was just one more mission.
Very well put IMO