Why is this post even here? Isn't hn about technology? How is the news of a murder even remotely tech related? Quality of posts on hn is falling these days.
No. Perhaps you haven't read the guidelines...
On-Topic: Anything that good hackers would find interesting. That includes more than hacking and startups. If you had to reduce it to a sentence, the answer might be: anything that gratifies one's intellectual curiosity.
No. https://news.ycombinator.com/newsguidelines.html
This story nevertheless doesn't really qualify as on-topic, but I assume this story is getting picked up here because it's a follow up to the initial story, which people found interesting due to the involvement of a DIY sub, rocketry groups, ...