Whatever it takes, I want to be part of the investigation.

"But I'm certain the board will also be part of the investigation."

"I think he wanted to be part of the investigation."

They have 2 hours to complete part one of their investigation.

You say your questions are part of a criminal investigation.

Those items, or ones like them, are part of an investigation.

My partner is working on another part of the investigation.

The last thing in the world he wanted to do was let her choose what part of the investigation to head up.

Officers had been looking for the car there as part of the investigation.

As part of the investigation, health workers have been taking samples.