I've tried resetting the sim, and they are not interactable unless I've collected a witness statement. It then allows me to follow the procedures such as checking the pulse, ect. It's when I listen to the Sim's plea is where the issue starts. After accepting to "revive," the so called deceased sim becomes non- interactable (the same happened before I interacted with the witness), although can be clicked on with cheats. I've had this one lot do this twice, so I'm not certain if it's designated to that one spot or if there might be others. I assume it might be some coding issue where it believes the sim deceased is still "alive" and moving, which might be the possibility of that triggering the issue, but I'm not sure. If anyone else has similar issues with this Reaper career, let me know!
Edit By Crinrict: Adjusted Title fit bug report at AHQ
