"We continue to investigate the case because it is a public matter."

The police investigated the case and kept it open because no body was ever found.

Things go wrong and the 3 decide to investigate the case as a group.

He said the information had come from police officers investigating the case.

The agency is working with Chinese health officials to investigate the case further.

Police would still be able to investigate cases where the criteria were not met.

State public health officials continue to investigate cases of illness.

However, the authorities do not seem to be investigating the case further.

A few months later, the police started seriously investigating the case.

The district attorney's office said it was investigating the case.