Tyler Hawkins (AKA Robert Pattinson), most likely, committed suicide because he missed his brother Michael, he knew that his family was finally able to get along and communicate with each other, and they would most definitely be okay if he wasn't there anymore.
Actually it was 9/11 and his father worked in one of the twin tower it shows it's 9/11 when we see Caroline at school with the date written on the blackboard :)
Chat with our AI personalities
no
He found out he had terminal cancer.
The reason is unknown and details of his death have not been released, except to determine that it was a suicide.
Jal, episode 3
Janet Vogel was the soprano vocalist of the band the Skyliners. She committed suicide by carbon monoxide due to depression.