This is the 2638th most frequent Turkish word.
tutuklanan
"Arrested" or "detained."
In this sentence, 'tutuklanan' functions as a participle, describing the man ('adam') who underwent the action of being arrested.
Polis tarafından dün gece tutuklanan adam serbest bırakıldı.
The man arrested last night by the police was released.
Here, 'tutuklanan' is used as a descriptive adjective for the subject 'kişiler,' specifying those who were arrested.
Tutuklanan kişiler, mahkemede ifade verdi.
The arrested individuals testified in court.
In this context, 'tutuklanan' acts as a modifier for 'bir grup protestocu,' identifying the group as those who were arrested.