This page of the guide to Disco Elysium contains a detailed walkthrough of the Perform field autopsy task.
In the task Perform field autopsy in Disco Elysium you must perform a field post-mortem and examine the Hanged man. You will get access to this task after completing the Getting the body down quest.
Walk over to the corpse, talk to Kim and perform a visual inspection of the body - putting on gloves is optional here. During the visual inspection, you may be tempted to try to cut off the belt, but this requires passing the Physical Instrument check.
As you work, you can unlock access to two tasks related to the investigation, and complete one hidden task at the same time:
- Fridge victim's body: if you tell Kim that you missed something during the autopsy and you need to re-examine the body, you'll have to find a way to cool the corpse;
- Find the bullet before you get fooled: a hidden task that sheds a whole new light on this case. Completing this task requires passing the legendary Perception check, followed by an easy Interfacing test;
- Send victim's body to processing: You can send the corpse back if you think you've already examined all the clues.