Nancy Kissel, 41 is accused of serving her husband, former Merrill Lynch banker Robert Kissel, a pink milkshake laced with sedatives which left him unconscious at the foot of the bed while she bludgeoned him to death with a heavy metal ornament on November 2, 2003.

Friends and family have testified that they had been informed the former banker was due to discuss divorce with his wife that night because he believed she was having an affair.

The accused has denied the murder charge and is out on bail.

She told a private doctor and police officers at the time that her husband was drunk and beat her after she refused him sex, and then disappeared.

Robert Kissel's decomposing body was found in the early hours of November 7, wrapped in a carpet in a storeroom at the Parkview residential complex, Tai Tam.

On Monday, police officer Tam Chi-chung, who conducted the first scientific search of the bedroom at the Kissel residence on November 7, testified that he found small spots of blood on the walls, the headboard of the bed, a picture frame, the top of a side table, the side of a wardrobe and on the television. There was also a large brown stain on the bed beneath the bedcovers, Tam said.

He also used chemical tests to confirm that the large stain on the carpet at the foot of the bed, originally concealed by an overlaying carpet, was blood.

Tam said a piece of cloth from the foot of the bed had been ripped off.

Under cross-examination by defense counsel Alexander King, SC, Tam said that he only used the test once - on that large stain on the carpet - to confirm that stains around the room were blood.

Earlier Monday, police officer Chan Ping-kong testified that he went to Parkview at about 7pm and was instructed to try to inspect the storeroom after it was reported that a ``large, stinky carpet'' had been moved there.

King suggested to Chan that he had gone to the storeroom to see if he could smell anything unusual because he already suspected there might be a body there.

Referring to photographs of the locked storeroom, King asked how it was that Chan could ``see into'' the room.

Chan replied that he got down on his knees, with his ear to the ground and one eye closed to try and see through the five-millimeter gap at the bottom of the door.

``What I could see was it was dark,'' he said.

The trial continues today before Justice Michael Lunn.