Police hunt for Washington couple who vanished in 'suspicious' circumstances after wife's co-workers raise alarm when she didn't show for work

Fears are growing for a popular chiropractor and her husband who disappeared suddenly from their Washington home at the weekend and have not been seen since.

Police arrived to carry out a welfare check at the Lacey home of Karen Koep and her husband Davido when she failed to turn up for work in the center of town on Monday.

The couple, who have two adult children, were not there, but their silver 2015 Toyota Yaris was found abandoned five miles away later that day at the Chehalis Western Trailhead in East Olympia, a popular starting point for hikers.

'Deputies responded to the residence located in Lake Forest Development and found that the husband and wife were missing and the circumstance surrounding their disappearance is suspicious,' said Thurston County Sheriff's Office in a statement on Tuesday.

'The couple's vehicle was missing from the residence and was later located by law enforcement near 67th Avenue SE and Ranier Road SE.'

Popular chiropractor Karen Koep and her husband Davido have baffled friends with their disappearance as police appeal for information 

Police found no sign of the couple when they were called by anxious friends to a welfare check at their lakeside home in Lacey on Monday after Karen failed to show at work

The missing couple have been married for more than 30 years and have two adult sons

'To ensure the integrity of the investigation we have not released many details.'

Local TV channel KING 5 Seattle reported that police initially arrested a suspect near the O'Reilly Autoparts store in the north-east of the city but he was later released without charge.

Davido is landlord to several properties in the area and police have been interrogating his tenants for clues to his disappearance.

'I've personally worked with 20 percent of the entire county sheriff's office in the last few days,' wrote tenant Julie Stedman on Facebook.

'You can't even imagine what has been going on his property I live on for the last 48 hours.

'He's a very nice man and its been hell. I don't want to say too much but I pray he's OK.'

'Davido has been a kind friend and neighbor here where the couple owns property near Rainier Road,' added Sue Cummings.

Karen Koep and her husband Davido in photos released by Thurston County Sheriff's Office

Karen Koep runs a successful chiropractor business at 6th Ave SE in Lacey

The couple's 2015 silver Toyota Yaris was found abandoned five miles from their home eight hours after police were called

The spot at the Chehalis Western Trailhead in East Olympia is not far from Koep's office

The mystery has left Koep's many patients at her successful practice on 6th Avenue SE equally baffled and alarmed.

One described her as a 'miracle worker', while another said she was the 'most caring person I know'.

'Karen was more than a healer,' added Phil Jasperson, 'she inspired me to make big changes in my life. I can't believe this has happened.'

Many have demanded more information from the police and advice on what they can do to help the search or the missing couple.

'Would it be helpful to have citizens out looking?' asked Jenna Marie Loss

'We want to help if it would be helpful. This couple matters so much to so many!'

'Karen is my chiropractor and friend I took care of both Justice and Cato from the time they were babies till they went to college,' wrote Jerri Morgan

'OK people let's find them.'