Ex-husband offers $30K reward for woman's killer

"It wasn't his idea," Smith said. "[The police] thought it might be productive to have a reward."

Police say Stephen Ng is not a suspect. The focus remains on two Asian male suspects who allegedly took an undisclosed amount of cash and jewelry from the home during the brutal attacks.

Yesterday, police released a photo a jade necklace they say was taken from the home.

Otherwise, there are few leads on the two Asian males who allegedly killed Priscilla Ng in the pre-dawn hours of June 19. At the time of the assault, police say Priscilla Ng and her boyfriend Andrew Chang were asleep in the second-story master bedroom of her sprawling Hillsborough home. The pair was tied up with a phone cord and suffered "blunt trauma and lacerations" as the suspects ransacked the home.

Despite his life-threatening injuries, Chang survived the ordeal and was able to crawl to a phone and call police.

Priscilla Ng died at the scene.

In the meantime, Smith said Stephen Ng continues to cooperate with police and is spending most of his time with the couple's young daughter. In addition to a $5 million settlement and control of the couple's multiple businesses, one of the major battles in the Ngs' acrimonious divorce was the custody of their child. The couple also has a 26-year-old daughter, Dorris, who along with her father is urging anyone with information on the crime to come forward.

Missing necklace, international search

During the harrowing one-hour home invasion, Priscilla Ng and Andrew Chang were given "distinct directions and requests" by their captors, said Capt. Mark O'Connor.

O'Connor declined to specify the nature of those orders or the language they were delivered in. Based on interviews with Andrew Chang, O'Connor said police don't think the victims knew their attackers. Anybody who may have had access to the mansion - including employees who may have visited the home for any reason - are being interviewed by police, O'Connor said.

"We know there were at least two Asian males, but there could be more ," he said.

In addition to several gas stations and a local telephone company, the Ngs owned businesses in Malaysia. Priscilla Ng's niece, who lives in Hong Kong, said Stephen Ng originally hailed from Singapore and moved to the United States several years ago.

Right now, the search for the missing jade necklace is national. Police say they are working on extending their search for a missing jade necklace across the globe.

Although several items of jewelry and an undisclosed amount of cash were taken from the home, police are focusing on the unique piece of jewelry.

Hillsborough police are checking pawn shops all over the Bay Area.

A photo of the necklace was provided by the couple's daughter, Dorris.

It has not been determined what weapon was used in the attack. Based on the "blunt force trauma" injuries the victims sustained, O'Connor said police can make certain deductions.

After crawling into a neighboring room to call police, Chang was taken to a local hospital where he underwent life-saving surgery. He has since been released from the hospital, O'Connor said, but continues to recover.

The getaway

Police aren't sure how the suspects arrived at 2545 Butternut Drive, but they know how they got away.

Days after the assault, a white Lexus was discovered to be missing among the many cars at Priscilla Ng's home.

The Lexus was found June 22 legally parked with no damage at Burlingame Plaza, an El Camino Real strip shopping center just miles away from the mansion.

Once at the plaza, O'Connor said the suspects could have gotten away a number of ways. They could've caught a bus along El Camino Real or walked to the Millbrae Caltrain station nearby, O'Connor said. Or they could have "transferred to another vehicle," he said.

Now Hillsborough police are reviewing surveillance tapes from businesses in the Burlingame Plaza for clues. As they scour tapes for clues in the mysterious crime, one thing remains certain.

"This was not a random crime of opportunity," O'Connor said. "The victims were targeted."

Anyone with information about this case is encouraged to call 375-7473. Callers may remain anonymous.

Yunmi Choi can be reached by e-mail at yunmi@smdailyjournal.com or by phone: (650) 344-5200 ext. 109.