Four weeks after a Cambridge man was last seen, Waterloo Regional Police are making another public plea for information that might help locate him.

Thomas Williams, 67, was last seen Oct. 3, walking along Grand Avenue South in Galt, near his home.

He was wearing a white button-down shirt.

Williams’ family is concerned for his well-being, as he requires daily medication for a potentially life-threatening medical condition.

“It’s not like him to go off somewhere. He’s usually around at his apartment, around town,” son Tom Williams Jr. tells CTV News.

“A couple days or a week is one thing, but when you’re approaching a month, that’s really concerning.”

Williams is described as white, 5’5” and 130 pounds, with grey hair and a mustache.

“We really need the community’s help on this. We’ve exhausted most of our leads at this point,” says police spokesperson Olaf Heinzel.

Anyone with information is asked to contact police at 519-653-7700 ext. 2299.