.... I can.
... Back when I was in college, I actually attempted suicide. Now, before everyone starts judging me, I urge you to imagine how utterly desperate one has to feel, in order to actually take that step. It is a desperate, self-centered, and terrifying thing to do.
... I personally felt that I had no other choice-- that there was simply no other way for me to end my pain, than to take my own life. I had been abused for many years as a child and had never disclosed the information to anyone other than my parents (who took little action to prevent further abuse). And then, when my dad died suddenly when I was 18 and my mom's coping mechanism was drinking herself nearly to death (with a 3 year old to take care of, while I was away at college....), I fell into a depression so deep I could barely breathe. And then, my mom was stricken with a fatal vascular disorder that required emergency brain surgery and after 3 semesters of failing school (because I was skipping class from being so friggin depressed) I finally decided I was a waste of air. I thought that if I flunked out of school, I'd never get into med school and I would pretty much be worthless.... so I tried to kill myself.
.... I was in ICU for 3 days on a ventilator. I can remember waking up and hating myself because I couldn't even kill myself right...
... One has to be in a completely self-centered and at a very, very low point in their life to actually make a serious attempt to end their own life. Depression pulls a shroud of pain over one's eyes, and allows them to see nothing but the bleak sadness, with no end in sight. It's a horrible, horrible disease of the mind. It's now been 5 years since my attempt and my own particular situation has changed dramatically, but it has taken a lot of work (therapy, lots of personal reflection, and serious soul-searching... not to mention all the effort to rebuild my academic record in preparation for med school admissions).
I can't imagine how devestated my family would have been if it would have been a successful attempt, and I feel such deep sadness for the family of the OP's neighbor. I pray that somehow they can make it through the difficult holidays ahead, and in time they can heal from this tragic event. My heart goes out to all who has been touched by it.