Trivia: During the opening of the film, Lindsay Seim portrays the younger Elise in the flashback sequence. However, Lin Shaye, who plays the older Elise, dubbed over Seim's dialog in post production. Director James Wan stated that this was done because Shaye has such a unique voice, and thus, it allowed her presence to be felt early in the film.
Trivia: When Specs and Tucker go into Elise's home, the painting on the wall is from Paranormal Activity 2 and 3.
Trivia: Very briefly in the film, you can see a computer wallpaper image with the characters Specs, Tucker and an unknown third man. This third man is actually director James Wan in a small "blink-and-you'll-miss-it" cameo.
Answer: He answered that while chasing Renai, it was because at first he didn't really want to but his mom kept planting seeds in his head and telling him that if he doesn't he's going to die and towards the end you can tell he was very close to dying so he gave in and try to kill the family. Also throughout the whole movie it talked about the fact that his mother basically forced him to kill people.