To find out
distinguish, recognize, identify; see discover.
To identify a criminal
disclose, expose, catch; see expose 1.
"detect." YourDictionary, n.d. Web. 17 August 2018. <http://thesaurus.yourdictionary.com/detect>.
detect. (n.d.). Retrieved August 17th, 2018, from http://thesaurus.yourdictionary.com/detect
To perceive, especially barely or fleetingly:
To perceive with a special effort of the senses or the mind: