Lewis Short
perscrūtātor (noun M) : id.
* A thorough searcher, an examiner, investigator (post-class.): talium rerum,Capitol. Max. 1 (al. persecutor); Veg. Mil. 3, 3 (al. prosecutores); Cassiod. Var. 2, 15.
Charlton T. Lewis, Charles Short, A Latin Dictionary