Police believe a businessman who was slain inside his upscale Fairfax Station home last October was the victim of a targeted robbery.

An artist’s rendering of the pickup seen near the scene of Yun’s murder. (Courtesy of Fairfax County police)

Detectives also said they are trying to find the driver of a white pickup truck with a landscaping trailer that was seen near Yun’s home around the time of the murder.

“We think his house was specifically targeted,” said Detective Daniel Bibeault. “There’s no public transportation there. You don’t walk there.”

Yun lived in a spacious home in a cul-de-sac in the 5700 block of Ladues End Court off of Fairfax County Parkway.

Bibeault revealed for the first time that Yun, who owned Dr. Wash carwash in Chantilly, was stabbed multiple times in the upper body. He also said detectives believe there may have been more than one person involved in the crime and said cash was taken from Yun’s home.

Yun’s wife found his body inside their garage shortly before 4 p.m. on Oct. 7, 2010.

In addition to the money, Yun’s 2002 Lexus LX470 SUV was also taken. It was found four days later in the 4300 block of Americana Drive in Annandale.

Since the killing, detectives have interviewed more than 80 people, reviewed over 100 hours of video and explored numerous leads, but they and Yun’s son, Matthew Yun, 31, asked for more help from the community.

Matthew Yun said he believed his father’s killer was likely someone he knew. Yun said detectives had made “considerable gains” in the case, but hit roadblocks when talking with the local Korean community, of which his father was a respected member.

“A lot of the Korean community are afraid of the police in general,” Yun said. “They are reluctant to come forward.”

Bibeault said forensic work is still ongoing in the case and police still have more video to review.

The reward in the case has been increased from $20,000 to $70,000, police said.

“For the past year, it’s been a struggle to cope with my father’s death,” Yun said.

Anyone with information is asked to contact Crime Solvers by phone at 1-866-411-TIPS or call Fairfax County Police at 703-691-2131.