This is the 17683rd most frequent Turkish word.
şüphelilerinin
"Of its/her/his/their suspects."
Şüphelilerinin here refers to the suspects related to the police. It is in the possessive form indicating the suspects that the police are concerned with.
Polis şüphelilerinin izini sürüyor.
The police are tracking the suspects.
Şüphelilerinin is used to denote the suspects in the context of the court proceedings. The possessive form indicates ownership in the context of the court examining their statements.
Mahkeme şüphelilerinin ifadelerini dinledi.
The court listened to the statements of the suspects.
Şüphelilerinin specifies the suspects at the scene being investigated by journalists. It reflects possession or relationship from the context of investigation.