Oscars and serie killers

How come this Japanese guy winning the Oscar is still walking free? I am talking about Kunio Kato who won the Academy Award for Best animated short film. Didn’t anybody hear his murder confessions?

“I sank the academy
I sank my family
I sank my team
I sank everybody who inspired me
I sank everybody in my home town.”

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PS. Hugh Jackman….wow! I guess I am one of the one billion women who completely fell in love, without ever seeing a film with him.