A family who bought a new home in New Jersey last year found that the house came with a feature they hadn't expected. 

Someone calling themselves 'The Watcher' sent threatening letters to the home over a period of weeks that claimed that they were watching the house, and that it was his family's duty to do so, dating back several generations. 

The home owners, who have filed a lawsuit against the people who sold them the house, said that they received the first letter three days after sealing the deal in May 2014, asking them why they were at the house, saying that they would "find out" and that "my grandfather watched the house in the 1920s and my father watched in the 1960s. It is now my time". 

Pic via CBS New York

According to the lawsuit (the entirety of which you can read here) the letters continued and made threats against the family's children, saying "did you need to fill the house with the young blood I requested?" and "once I know their names I will call them and draw them too [sic] me", as well as "I asked [the former owners] to bring me young blood".

The letters continued into June and July of 2014, in which 'The Watcher' made further threats against the family's children, saying "who has the bedrooms facing the street? I'll know as soon as you move in" adding that "it will help to know who is in which bedroom then I can plan better". 'The Watcher' also asked of the family's children "have they found what is in the walls yet?" and "will the young bloods play in the basement?"

The lawsuit from the couple that bought the house claims that the sellers, the Chicago Title Insurance Company and others involved in the sale all knew about the letters from 'The Watcher' and failed to disclose the information, as they knew it would jeopardise the sale. 

The family has been unable to sell it on as a result of the letters, and while police state they have an "ongoing investigation" into the letters, no charges have been filed against 'The Watcher' and they are appealing for anyone with any information to come forward.

Via BuzzFeed, Gawker, CBS New York. Main pic via CBS New York