He should have called for an investigation some time ago.

He called for a further investigation to be carried out.

It also called for an independent investigation into the event that led to the violence.

Yes, we did call for an investigation into the shooting.

But many at the meeting called for an investigation to see if it was deliberately set.

The film will call for a new investigation into the attacks.

Civil rights groups have also called for an independent investigation.

In May 2009 she called for an investigation into police violence against children.

Some people have called for an outside investigation of the police.

They have called for a full investigation into the episode.