If Tate killed himself when the SWAT team stormed the house (remember the blood covered version he saw of himself in Ben’s office?) then his body would have been recovered and buried, I’m guessing. SO maybe he is stuck in the house until he realizes the truth and gets the help he needs. Which is why Constance is having Ben treat him, maybe there’s hope for him & the other ghosts. Maybe even Moira if her body is found. Guess we’ll see next Wednesday!