Lost a dog ... (Fallout 4)

As always in Bethesda games, I lose either a horse or a dog. killed the murderer of his wife, then went to the investigator to the robot to report everything, at that time the dog was with me, but during the conversation with the robot (or whatever it was) there was an option to teleport with him to the doctor so that she would investigate the killer's brain. Accordingly, I cannot have two companions, and I thought that the dog remained in this study of the researcher, but he is nowhere to be found. searched by the red rocket, near the house, in different settlements, restarted the game 5 times