Vestigâtor, pen. prod. vestigarôris, m. ge. Verbal. Colu. He that seeketh: one that traceth: an hunter.Vestigabundus.One that feeketh muche.
Lewis and Short: Latin dictionary
vestīgātor or vestīgĭātor, ōris, m. [vestigo], a tracker, spy, tracer, searcher (not in Cic.): vestigator a vestigiis ferarum, quas indagatur, Varr. L. L. 5, 94 Müll. (where the read. is vestigiator); so Col. 9, 8, 10; Sen. Ben. 3, 26, 2; Dig. 33, 7, 12, 12.