HOUSTON – Have you seen Luat Trinh? The 76-year-old man with dementia went missing on Monday after he left on a bike in an unknown direction at the 2200 block of Woodland Park Drive. He was last seen wearing a white shirt, blue jeans, white shoes and a lime-colored bike helmet. He is described as 5 feet, 7 inches tall and weighing 160 pounds. If anyone has any information or seen him please call the Houston Police Missing Persons Unit at 832-394-1840, attention West Side Patrol 20 District.