investigatory

An inquiry into—ah—certain facets of past investigatory methods.

They glittered then with a strange cold light, those variegated orbs, but their ordinary expression was earnest and investigatory.

He became acutely aware of his disfigured face, and felt his swelling bruises with a limp, investigatory hand.

Suddenly he started out of a vague reverie and pressed an investigatory hand to his side.

The investigatory expedition to the ominous red spot of the giant of the solar system was on.