23-years young man found dead at the Eclipse Screening

After the screening of Eclipse at Wellington, New Zealand cinema the cleaner found one of the customers sitting on his place. Cleaner thought that this guy felt asleep and asked for a help of security.

But what was the astonishment when they found out that he was already dead.
The local police is investigating that case, however they don't know who is that guy and what exactly has happened as there was no obvious injuries on the body.