I actually mentioned some possible fcked up family **** in my post about it as something in reality as a possible cause for the weird case of the murders/deaths/suicides.
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The original follows more closely to the book. Whereas, I believe aspects of the remake or more true to what actually happened. All but the whole ghost aspect and ancient murderer guy- looked into that and it was in a seperate area from the Amityville House, thus it couldn't have happened. It wasn't any newly found information, just something to dramaticize the story.
HOWEVER- George Lutz has never really talked about or ever wanted to talk about what happened on their final night. Thus, for the most part I believe-if I recall correctly- the final night in the book, as well as films, is fabricated. But, psychologically- I believe the remake hits it on it's head.
Something happened that final night, George Lutz was slowly falling into madness- but, then that seems to disappear the final night in the original and in the book. However, the final step of becoming insane is in the remake... it's something someone would want to keep secret and never talk about, thus it's the ending I've always believed happened and was portrayed on screen in the remake.
Unless it's something else more horrifying than that that the Lutz's want to keep secret for a reason.
So, for the most part- the original is the MOST accurate. Though, the ending of the remake could be the closest to actual ending of what actually did happen. It seems to fit more with the progression. But, we will never know what happened on the final night. Which is another part of the reason why I believe them, in some regards they are open and direct about what happened- in others, they aren't.
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Being in Amityville:
On a side note, this whole case is very much a part of the community. I drove there a couple of months ago actually. There were three other people I met who were also looking for the house. I asked a couple of people about it and just as you'd imagine, they had stories about it or things about it they heard from someone they knew. There were also two kids, about five years old, who stopped by me and another 'looker' and asked us "are you looking for the house?" It was very cool. Just like you'd imagine from horror movies.
I can say that the river they escape on in the remake is actually far from the house itself, it isn't within as relative distance as it was displayed.
The area however, I believe the original filmed their because it looked very familiar- the whole community. Especially the main town part of the community.
The house itself, though, has been 'hidden' by the new owners- thus, it's difficult to exactly pinpoint it. Could be one of two. And cops patrol the area, luckily they weren't there when I was.