Lance corporal Rohaniza Roslan, 29 - considered the prosecution's star witness - appeared court today.

Rohaniza was with the two accused - chief inspector Azilah Hadri, 30, and corporal Sirul Azhar Umar, 35 - when murdered Mongolian national Altantuya Shaariibuu was allegedly taken away by the trio.

She testified that the red Proton Wira - which was seen by Abdul Razak Baginda's private investigator P Balasubramaniam as the car that took Altantuya away on Oct 19 last year - belonged to her.

Examined by deputy public prosecutor Noorin Badaruddin, Rohaniza said she was off duty that night and was keeping Azilah company at the police headquarters in Bukit Aman.

She and Azilah were a couple at that time.

"Azilah had an assignment to escort the PM (prime minister) and DPM (deputy prime minister) to Hong Kong but it was cancelled. So I was there to help him unpack his belongings," she said.

Rohaniza elaborated that Azilah received a call and later followed him to Abdul Razak's house in Bukit Damansara. She said she saw an Indian man talking to a "Chinese woman" (Altantuya) outside the house.

She told the court that she then moved to the back seat and the 'Chinese woman' sat next to her.

'Don't create trouble'

According to Rohaniza, a man in a green cap then showed up, entered the car and Azilah drove them away before dropping the man off at a junction nearby.

"He got out of my car, went into a green (Suzuki) Vitara and Azilah tailed him to a highway towards the direction of Bukit Aman.

"It was then the 'Chinese woman' asked us who we were and Azilah told her 'police'," the Petaling Jaya-based officer told Noorin.

She said Azilah told the 'Chinese woman' not to create trouble at Razak's house because he has a family and that she should find Razak at his office instead.

Rohaniza, who was in tears when she was asked to point Azilah out, revealed that she has known him since 1998 when she joined the police force.

Both Azilah and Sirul Azhar are charged with the murder of Altantuya. Razak, 47, is charged with abetting them.

Members of special unit

Prosecutors alleged that Abdul Razak and Altantuya met in 2004 and began a whirlwind affair, during which he gave her money.

After they broke up a year later, he allegedly continued to give her money whenever she demanded. But the payments stopped last year, prompting her to become dissatisfied and travel to Malaysia in October, the prosecution said.

Prosecutors say Abdul Razak planned Altantuya's killing and ordered the two police officers - members of a special unit charged with protecting the country's leaders - to carry it out.

Altantuya was killed by 'probable blast-related' injuries in a clearing in Shah Alam after she was driven away from outside Abdul Razak's house in mid-October.

All three accused faced the death penalty.

The hearing will resume on Monday.