The major's answer was no, commanders should not investigate anything without first talking to the base's military counsel.

And then it was usually a good idea to start investigating without further ado.

But we can't go up there and investigate that rock right now without the whole town coming down on our necks.

We couldn't investigate them without some hard evidence and a search warrant.

A top prosecutor said Mexico would continue to investigate without American help.

I can't investigate the fascinating stuff without the authority of my office.

Make your story strong enough, so the cop will investigate without delay.

I'm out here investigating a murder without any official status.

There are some cases that you simply cannot investigate properly without an engineer's report.