A four-legged police worker in Chilliwack B.C. is being credited with finding a lost senior with dementia who had wandered away from her home.

Ray Miller says it's not often that he lets his wife of 63 years, Isabel, out of his sight. That’s because three years ago, Isabel, 83, was diagnosed with Alzheimer’s disease. She now counts on her husband for pretty much everything.

While Isabel doesn’t remember it anymore, she gave her husband quite a scare last Thursday night when she wandered away form their home.

“About 10:30 p.m., I got sort of drowsy and went down to have a little catnap. And when I got up, I looked for Isabel, and she wasn't in the house. First time she ever left the house without me," he told CTV British Columbia.

Miller thought his wife would be close by, since she can't walk very far. So he went out with a flashlight to look for her. He soon realized he needed help.

"I phoned 9-1-1 when we couldn't find hide nor hair of her," he said.

That's where Const. Mike Jordan from the local RCMP canine unit and a black German Shepherd named Cargo come into the story.

Along with a team of police searchers, the police members started sweeping the farmland around the Miller home in the dark.

"We take these (incidents) very seriously. A large number of resources in the area were dedicated to locating Mrs. Miller," Jordan said.

They were getting nowhere until Cargo picked up Isabel’s scent about 30 minutes into the search. The hard-working dog found Isabel on the neighbour’s land, tucked behind some bushes where no one could see her in the dark.

"I walked past there a couple of times, shining the flashlight and I couldn't notice her because the shrub was (waist) high and she was laying there under the shrub," Ray said.

Isabel wasn't hurt and doesn't remember much about her ordeal. But she was happy to meet her rescuer Cargo over the weekend.

While it was just another day at the office for Cargo and Const. Jordan, their help is something Ray won't soon forget. He says he’ll be keeping a better eye on his wife in the future and will consider getting some motion sensors near the front doors.

With a report from CTV British Columbia’s Julia Foy