The phrase "to catch the culprit" means to find and identify the person responsible for a crime or wrongdoing.
Sentences with «to catch the culprit»
Chalk it up to experience and try to catch the culprit in the act next time. (grca-nrc.org)
In 2015 and 2017, the researchers caught the culprits. (sciencenews.org)
In order to catch the culprits with a crack investigation team, the French authorities bring in a patsy to distract the media attention. (fatguysatthemovies.com)