vestigator
From LSJ
Latin > English (Lewis & Short)
vestīgātor: or vestīgĭātor, ōris, m. vestigo,
I 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.
Latin > French (Gaffiot 2016)
vestīgātŏr,¹⁶ ōris, m. (vestigo), celui qui suit la trace, chasseur : Varro L. 5, 94 || celui qui cherche : Col. Rust. 9, 8, 10 || [fig.] espion : Sen. Ben. 3, 26, 2.