Because it was an investigation conducted in secret by the Japanese police, he wasn't supposed to show his ID.

He was investigating two people in relation to the police and the people around them.

As there were no signs of violence present at the scene of the crime, both murder and accidental death are being considered by the police.

There are 141 people within the police force alone who have access to classified information on the Kira investigation.

I also don't want the police to know that I've come into contact with an FBI agent.

Even if this is for the Kira case, I can't believe the Japanese police would go this far.

And, these are related to the trial.

The local police are treating these cases as connected. The investigation is ongoing.

A police manhunt. They were chasing some dealers.