Two hospitalized after 'pufferfish toxin poisoning' at famous Busan restaurant

https://youtu.be/KJLOUTrlf_w?t=68
Initially, the restaurant offered to compensate for the meal costs and medical expenses, but they are now saying they will provide compensation based on the insurance company's investigation results.
I heard that no scene investigation was conducted at the time; will a proper investigation actually take place?