"Threw my life away for a fucking lie"

Mary • My beliefs and opinions are constantly evolving
This was posted on New York Daily News 18 hours ago. A man killed another man bc his girlfriend told him that she was raped, when really she was having a threesome.
If you want to read the full article, just search up "Brooklyn man sobs" and it should be the first one. That's how I found it. What do you guys think about the whole situation and what should be done?