Personally I think the cops showing up TWICE was because there were too many cooks in Amber's DV hoax kitchen and someone in that mix of friends that day didn't realize that their call only served to inadvertently provide more evidence of nothing. I think
@wasnt_me is correct. They thought they could just show a call to the apartment, and then later show photos of a mess that someone other than JD created, and claim that LE just hadn't taken any documentation of that "evidence" during their visit. That second call, answered by the body cam wearing officers, tanked that plan. ALL MOO IMO ALL THE COWS ETC