Hard Evidence - Stuck identifying scrape

[Gamehunter]

I am stuck trying to match the scrape made on the table. I have the impression, but I don't have anything to compare it to.

I suspect I need to get into the triplet's bedroom, but I haven't gotten a warrant for that yet. Any ideas out there????

[Dangerzone]

compare the scratch on the table.... with the zipper you find on the floor behind that table