The fact that he's extremely suspicious makes him well suited to being head of Security.

He was extremely suspicious, he knew I wasn't a shooter.

Refusing to give his name would be extremely suspicious.

"To have two fires in five days in the same location is extremely suspicious."

The fact that there was no trace of him online is extremely suspicious.

On the other hand, you are extremely suspicious from the get-go.

"If something looks extremely suspicious, yeah, but a random check?"

This however, had precisely the opposite effect: many members became extremely suspicious.

This header does not normally change during use; it would be extremely suspicious if that were to happen.

In fact, my warning them about the danger to the king would look extremely suspicious.