BOULDER — The Boulder Police Department is looking for 56-year-old David Jan Brown, who was reported missing Monday.

He was last seen by his roommate on July 26, at 4500 19th St. His roommate left for vacation and did not see Brown when he returned.

Police believe Brown may be a danger to himself.

Brown is white, about 5-9, and weighs 140 pounds. He has brown hair, green eyes and a mustache.

He is known to frequent Amante Coffee at 4580 Broadway. Brown owns a red Schwinn bicycle that has not been located.

Anyone with information about Brown's whereabouts is asked to call Boulder Police at 303-441-3333, or their local police department.