Meaning of “suspect” - Learner’s Dictionary

suspect

noun [ C ] us uk /ˈsʌspekt/
Police think the suspect has now fled the country.The suspect is now under guard in the local hospital.It took three officers to hold down the suspect.The police have not ruled him out as a suspect.The suspect remained locked up while awaiting trial.

B2 someone who may have committed a crime:

He's the prime suspect (= the most likely suspect) in the murder case.

(Definition of “suspect noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)