Suspectedly

He smiled suspectedly when I asked about his whereabouts last night.

The employee typed on the computer keyboard suspectedly, fearing that someone might be monitoring their activity.

The child's sudden illness made the parents look at the new babysitter suspectedly.

The stranger eyed the crowd suspectedly, making everyone uncomfortable.

The manager inspected the faulty machine suspectedly, trying to identify the source of the problem.