Satsudou - Vol. 3 Ch. 19

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Never confirmed but is suspected that he committed suicide.

Last year he was embroiled in a controversy with the "author" of Yani Neko because it placed higher in a contest (not sure I think it was the Next Manga award), he created fake accounts to defame and harass them (both are from the same magazine and publisher), the publisher conducted an investigation and discovered his doings, and eventually put the manga on hiatus.

Months later other twitter accounts discovered that he also did the same to his ex and her family members...

I guess he has been under heavy stress and finally, broke the camel's back. It's a sad case. The artist is not a criminal, just an asshole. He deserves a punishment but not at the cost of his life.