Jeremy Sams Walkthrough Part 3
Walkthroughs For Blackwell Deception
The High Line Murder Scene
Upon arriving at the High Line Rosa will spot a cop looking at a chalk outline. That would explain a bit about Jeremy's condition. Talk to the Detective and exhaust all dialogue options. When your only option left is either to leave or say he's being difficult, it's time to leave.
Head back to Jeremy's. All you need to do is click on the photos on the table nearest the apartment door. This will prompt Rosa to ask if she can take the Photo. Once Jeremy has let Rosa have the Photo it's time to head back to the High Line.
This time don't even bother trying to talk to the Detective. Just select the Photo from Rosa's inventory and use it on the Detective. It won't take Detective Durkin long to confirm that this is indeed the man that was killed. He'll ask Rosa for a bit of information, then head on his way.