Indonesian police plan to scrutinise the bank details of the national airline's outgoing chief, in an inquiry into the death of a rights activist.
Munir was poisoned during a Garuda flight last September
Munir, a prominent campaigner, died of arsenic poisoning on a Garuda flight to Amsterdam last September.
A fact finding team has also urged the police to investigate several members of the National Intelligence Agency.
But there has been no formal evidence linking Garuda, the security forces and the death of Munir.
A spokesman for the Indonesian police said the outgoing director general of Garuda Airlines, Indra Setiawan, was being interviewed about Munir's death.
Police last week named another man, Pollycarpus Priyanto, as a formal suspect.
Mr Pollycarpus, a pilot for Garuda, allegedly gave his business class seat to Munir before disembarking at a stopover in Singapore.
Munir is said to have sent an SMS text message from Singapore airport to his wife telling her he was feeling ill. A few hours later he was dead.
Mr Pollycarpus has denied any involvement in Munir's death.
Munir took up the cause of numerous activists who disappeared in suspicious circumstances, and also spoke out against the abuses committed by the Indonesian military across the country.
He once said he had lost count of the number of death threats he had received.