If you're the case officer, you could order an investigation.

Home Office officials have ordered an investigation into the case.

I have ordered a full investigation into the history of this family.

The attorney general has ordered an investigation of the judge involved.

He said news reports had led him to order a high-level investigation.

The government ordered an investigation, but never issued a report on what had happened.

But no one in District 15 ordered an investigation into their absence.

It was another year and four months before the speaker ordered an investigation.

The government held its own inquiry, but in 1966 ordered an independent investigation.

"If that does not satisfy me, we will order higher investigations," he said.