That door certainly looks kicked in... and with bloodstains too, did you ever find out if there was any known police-style history of the house? Did you try any smudge sticks? Salt sprinkling? Clapping in corners? Do you have house animals (cats, dogs)? If so, how do they feel about that room? It's possible that something may have happened that the police don't even know about, that left weird energy, maybe not a death, but maybe someone got hurt, and someone had to kick in the door to help them or something.. even non-death events can leave energy...