The tragic and heartbreaking information you received is, regrettably, true
He left no suicide note. Swartz’s mother writes on Hacker News:
Aaron has been depressed about his case/upcoming trial, but we had no idea what he was going through was this painful. Aaron was a terrific young man. He contributed a lot to the world in his short life and I regret the loss of all the things he had yet to accomplish. As you can imagine, we all miss him dearly. The grief is unfathomable.