The Worstest Nightmare [English Adaptation]

The police have spent years trying to solve the terrible mystery of a murder caused in the fast food center "Diamond's Fun Paradise". They were about to close the case, since the responsible for the murder disappeared without leaving a trace. Until a devastating accident is reported to the police center. Princeton, who works there, decides to reopen the case on his own to find an answer to these horrible events. Will he be able to achieve his goal?