I'm no longer sure I even have a role in the investigation.

She wanted to see him, but was no longer sure if he intended to come to her.

I am no longer sure of anything where he is concerned.

I'm no longer sure there is anything here for any of us.

She lost her way and was no longer sure where his rooms were.

To be frank, I'm not sure of anything any longer.

What I am no longer sure of is whether she would tell me.

On this question, I am no longer sure of exactly what we have done.

I am no longer sure whether the government still has responsibility and control.

I'm no longer sure she'd put the welfare of the group over her own personal needs.