it was just a 1 hr show of unsolved murders/mysteries.
they showed the kid who killed his whole family. Showed some of the footage back in the day, which i found kewl. Talk to some people that drank with the son before the murders.
that was all they had about amytiville. Then they did the lady who loved gorillas in africa? and was axed to death in 85'? They made a movie about her, which i have seen.