Photos and other evidence from the home shows Cody Amato was shot as soon as he walked in the door.
After learning about the relationship and the stolen funds in November, his family sent Grant Amato to a rehabilitation center for internet and sex addiction, according to investigators.
That apology letter, documents and video interviews with Amato were released Monday by prosecutors as part of the case against the 29-year-old accused of killing his family after he says they forced him to cut ties with a woman with whom he formed a relationship via the website MyFreeCams, where people can pay women for sexual photos and videos.