Crows are very smart and very flock oriented in nature. When they claim a person or place they rarely move on from them. In mythology they are seen as malicious tricksters, or sometimes representatives of The Morrigan. An Irish... diety(?) The Morrigan is associated with war and death, believed to incite warriors to battled she is sometimes depicted as a death omen and sometimes as a protector of warriors. Good luck OP. Sounds like you're gonna need it for this case.