New photo shows man the day he went missing

SAN DIEGO -- Volunteer drone enthusiasts lent their services Wednesday to ongoing efforts to locate an Alzheimer's patient from the Rancho Encantada area of San Diego who has been missing for nearly a week.

Operators of the camera-equipped flying machines were scanning open areas around the home of 85-year-old Taiheng Sun, who disappeared last Thursday, according to the Scripps Ranch Civic Association.

Police believe Sun left his home around 5 a.m. that day,

A surveillance camera captured images of Sun walking to the east on Stonebridge Parkway about 8:30 that morning. He was clad in black or dark-colored pants, a blue long-sleeved shirt, a white jacket, gray Vans shoes and a blue baseball hat, and was carrying a white jacket.

The last confirmed sighting was at 8 a.m. that day, as Sun was walking eastbound on Stonebridge Parkway and Via Santa Pradera.

Relatives of the Maple Grove Lane resident told authorities he had been depressed recently and had expressed suicidal thoughts. He does not drive or have access to other transportation, and knows no one in his neighborhood outside of his family, they said.

There is no evidence of foul play related to Sun's disappearance, police said.

Sun is described as a 5-foot-6-inch, roughly 140-pound Asian with gray hair and brown eyes. He speaks very little English, according to San Diego police.

Anyone who might be able to help locate Sun was asked to call SDPD communications at 619-531-2000.