This is the 4727th most frequent Turkish word.
delillerin
"Delillerin" means "the evidences" or "the proofs" in English (possessive form indicating "of the evidences/proofs").
In this sentence, 'delillerin' is the possessive form meaning 'of the evidence,' referring to the quality or status attributed to the evidence.
Delillerin güçlü olduğunu iddia etti.
He argued that the evidence is strong.
Here, 'delillerin' indicates that the evidence is being pursued, showing possession or association related to the verb 'koşuyor'.
Polis delillerin peşinde koşuyor.
The police are chasing the evidence.
'Delillerin' in this context signifies the possession or association, describing the evidence whose absence influenced the investigation.