Crews continued to search for missing country singer Craig Strickland on Sunday, Jan. 3, as his wife, Helen, remained 'positive.' Credit: Courtesy of Helen Strickman/Instagram

Crews continued to search for missing country singer Craig Strickland on Sunday, January 3, as his wife, Helen, remained "positive."

Oklahoma Highway Patrol began the seventh day of the search for Strickland on Sunday, as his band, Backyard Anthem, tweeted a photo along with the words "Hopeful Today."

Helen, 28, also posted a photo on Instagram that showed her on a boat. "Searching for Craig on a friend's boat this morning," she wrote. "We located a cove that looked promising - Officers and one search & rescue K9 are currently searching the area. Hopefully positive news will follow this afternoon."

The country singer, 29, has been missing since he and his friend Chase Morland went duck hunting during winter storm Goliath on December 26.

Moreland's body was found two days later, as was their capsized boat, but Strickland remains missing.

In an Instagram post on Saturday, January 2, Helen shared a video of a friend wearing waders in an experiment to see if he would be able to swim and float with them on.

"We are able to stay positive after conducting an interesting experiment to see if waders actually cause a person to sink," she wrote. "Since Craig was most likely wearing his waders it would be helpful to know what actually happens when a duck hunter falls into the water. Craig's friend put on the same style waders Craig wore last Sunday and tested its buoyancy in the hotel pool. From this experiment we can conclude that Craig may have actually floated after the boat was capsized."

Helen spoke about the challenges of the past week in an interview with 40/29 News on Saturday.

"He's in a better place," Helen said of her husband. "It's more painful for us to think he could be underwater. Still we want that closure in seeing him."

She also thanked fans and family for their continued support and prayers.

“Every time there’s a post from some random person who I have never met before that says, ‘Hey, I don’t know you, I’m reading this, I’m praying for you, my heart goes out to you,’ it’s almost like I don’t have to hurt on my own,” the former Miss Arkansas said.

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