Mark portrayed 'Peter' (iirc)
(the owner or worker of the Jewelry shop ^, on Maple) as not having a 'great opinion of Lindsey &/or the Baum family. "~That girl was up to 'things'" (Lindsey)
Mark also didn't have such a great opinion. Mark mentioned being aware Lindsey was on the internet. He generally & repeatedly came off disliking Lindsey &/or the family.
Mark added one other thing. Mark said he believes 'Eric' (who lives (according to Marks pointing) in the North-Eastern part of town) 'probably did it' (as in abducting Lindsey) Mark said Eric had conversed with him (@ an unknown time) about 'young girls.
The conversation was strange.. but you couldn't expect much else. At one point he stopped talking almost like he'd just realized he's telling all this to a stranger & briefly thought twice.
If nothing else i'd suggest an interview with persons from this ^ Jewelry shop.