who called, the condition of the apartment, and Jeremy's walk

I believe the police report said Sophie called in the missing person. But Marcus said Dev called it in. I think the police report said the apartment was otherwise in order. But Marcus said it was in disarray. Jeremy's walk to the trailhead took an hour. But Sophie said he lived nearby, so his walking seemed normal. → Is Marcus misinformed, or covering up? → Is Sophie covering up?