Elderly Honolulu man Chang Ho Han has now been missing for a month. Han disappeared without a trace in January, but his family is not giving up hope.
The 70-year-old Waimanu street resident was last seen near Ala Moana shopping center. The family has been distributing fliers, and set up a Facebook page in hopes that someone would remember seeing him.
The search has expanded as far west as Waianae, and Han's family will next focus on neighborhoods in Wahiawa and along the North Shore.
"I just want people to know if anyone sees any new face -- a new face of an elderly man in the neighborhood -- don't hesitate to report it to the police. There is a chance it could be my dad," said Rachel Han Song.
The family said the Honolulu police have been helping to check homeless encampments around town, but have not turned up anything.
The retired limo driver suffers from Alzheimer's and was last seen wearing a red jacket and white cap.
If anyone thinks they recognize him, they should contact Honolulu police.