Look outside the windows of your base, all of them. He will appear and you can get him back :)
(The upstairs windows first, preferably.)
i tried that, all i saw was some red blob for a second through the admin room window and a blood stain on the other side, still no sign of kerfur
THIS WORKED FOR ME. After I looked outside the top windows the event stoped. When I checked Kerfur´s cam, it respawned in the river near base
