The search for the man police believe responsible for the killing of a woman at a business in Burnaby has expanded across the Lower Mainland.

On Tuesday, the Integrated Homicide Investigation Team provided an update on the investigation into the murder of Hee Sook Youn, noting police are still looking for her ex-husband, Youngku Youn.

But IHIT is also asking for the public’s help finding 54-year old Kyonghee Kim, who police believe is Youngku Youn’s girlfriend and who may be with him. Kim has not been in contact with anyone since Oct. 5, and family and police are concerned for her well-being. Police believe Kim could be in danger.

IHIT has released a timeline of the events related to the case starting on Oct. 5.

At approximately 11 a.m., Hee Sook Youn was found dead in the bathroom of her business in the 4500 block of North Road.

At the same time, Ridge Meadows RCMP received information about a man who was suicidal. This man was identified by the caller as Youngku Youn. At this stage, police said Youn was a person of interest in the murder of his ex-wife. Ridge Meadows RCMP conducted a search in their area and located Youn’s PT Cruiser on the corner of Harris Road and Fraser Way.

Just before 11 a.m., Kyonghee Kim received a call from Youn, and Kim’s vehicle was spotted on the Golden Ears Bridge just before noon.

At 11 p.m., Kim’s grey Hyundai Sonata was spotted by park patrol employees in the Golden Ears Park, just off of Mike Lake Road.

Police noted investigators found Kim’s vehicle in Golden Ears Park on Oct. 8 and determined that the vehicle had been in the area of the park since the evening of Oct. 5.

IHIT said various police agencies were involved in an extensive search of the park, but neither Youn nor Kim was found.

Youn, 60, is described as five feet, seven inches tall, weighing 143 pounds, with brown eyes and black hair.

Anyone who sees the pair is asked to call 911 immediately.

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