Jakarta – The Attorney General's Office (AGO) said Friday it had further evidence to implicate exonerated suspect Pollycarpus Budihari Priyanto in the murder of human rights activist Munir Said Thalib.

The Junior Attorney General for General Crimes, Abdul Hakim Ritonga, said the AGO had secured more than five conversation recordings on top of a telephone call between Pollycarpus and former Garuda Indonesia president director Indra Setiawan that stunned the court when it was played Wednesday.

"The other (tapes) are recordings of witnesses' statements during the interrogation process. If necessary, we will play them in the next court session," Ritonga was quoted as saying by news portal detik.com. "These recordings will be our strong weapon if any witness denies his statements during the trial."

The recording of the phone conversation between Pollycarpus and Indra was played for the first time in public during Wednesday's court session. The recording, which emerged as an important development in the case, has strengthened evidence that the State Intelligence Agency (BIN) was involved in the murder.

In the recording, both men mentioned the existence of written orders from BIN asking Indra to assign Pollycarpus as an aviation security officer on the 2004 Garuda flight to Amsterdam on which Munir died of arsenic poisoning.

Meanwhile, the lawyer for key witness Raymond "Ongen" Latuihamallo has accused police officers of using intimidation to extract statements from his client. Ozhak Sihotang said that his client was also once interrogated without legal representation present.

On April 24, Ongen was taken to the National Police's Mobile Brigade headquarters in Kelapa Dua, Depok, and stayed there overnight. Ozhak said the actions of police were intimidating and inappropriate.

"This (interrogation session) was strange. As a key witness, my client should have been treated properly by the police," Ozhak said. "My client could have given incorrect statements if he was under pressure."

Ozhak used the claims of intimidation to request that the judges only consider testimony given by Ongen during the trial. "Based on the Criminal Code Procedures, testimony to the court could contradict the (police interrogation) dossier."