UPDATE July 14, 7:11 a.m. - LeeAnn Wilmoth was found alive Friday morning and Eric Ruska is in custody, a source tells TV6 News.

Search efforts for the pair began Monday morning after they did not return from a fishing trip on Chicago Lake. Investigators feared Ruska would harm Wilmoth because he has a criminal history.

Details on Wilmoth's condition are not immediately available, but she is alive, and Ruska is in custody.

Watch your TV6 Morning News for continuing coverage.

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UPDATE: July 13, 1:45 p.m. -

The Michigan State Police Negaunee Post continues to investigate the missing person complaint originally taken on Monday, July 10, 2017. Investigators are asking for public assistance with locating the pictured persons and/or vehicle.

If you have seen either of these persons or the below pictured rusty black 2006 Chevy Colorado with a Michigan registration of BVB 7631 please contact the Michigan State Police Negaunee Post at 906-475-9922. The MSP continues to receive assistance from numerous local, state, and federal agencies as part of the ongoing search effort.

The photo of the truck, pictured at the bottom of this article, was taken after Ruska and Wilmoth went missing on Sunday and is the exact truck authorities are looking for.

Michigan State Police said this is still an active investigation for both missing individuals and they believe they are both still alive.

The authorities appreciate all of the tips they have been receiving and are checking into each and every one. Future tips should be called into 911 or MSP - Negaunee Post at 906-475-9922.

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UPDATE: July 13, 6:45 a.m. -

The lead Michigan State Police detective for the search says there were no new developments overnight. Land searches across Delta, Alger and Marquette counties continue. LeeAnn Wilmoth and Eric Ruska were reported missing early Monday morning.

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UPDATE: July 12, 7:00 p.m. -

Wednesday afternoon, Michigan State Police officials were going door-to-door in the Au Train area of Alger County asking the homeowners if they had seen LeeAnn Wilmoth and Eric Ruska.

"I was coming back home, and there were 5 police cars down the road, so I stopped and they stopped me, and they said we're looking for a truck. They went to all the houses on this road, where they saw anybody. They even went down in the next lot over where there's nobody living," Au Train Township resident Martha Penn said.

No additional details have been released at this time. The investigation is still ongoing. TV6, FOX UP and UpperMichigansSource.com will have new details as they are made available.

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UPDATE: July 12, 4:30 p.m. -

The search continues for 28-year-old LeeAnn Wilmoth and 37-year-old Eric Ruska. The two have been missing since early Monday morning.

Michigan State Police have been searching for the two individuals who went missing in the Chicago Lake area of Delta County.

"Right now, we are just doing a diligent effort on doing a ground search trying to locate the vehicle that's owned by the male subject in question. At this point we are trying to locate the vehicle, the whereabouts, and trying to check on the well-being of both of the individuals hoping they are still together,” Michigan State Police Detective Sergeant Christopher Croley said.

The two were believed to be co-workers who went out fishing on the lake. Ruska's boat was found on the water, however authorities are still looking for his vehicle similar to this one. It's advised to be on the lookout for is a black 2006 Chevy Colorado.

“We've been utilizing all of our resources that are available,” Michigan State Police Detective Sergeant Jay Peterson said. "We've had our MSP Aviation unit, our Michigan State Police dive team and our K-9 Units have been searching along with troopers and local agencies that have been assisting us."

According to a released official document, investigators believe LeeAnn Wilmoth may be in danger due to lack of communication with family members. They also believe Eric Ruska is a possible suspect due to prior criminal history of sexual assaults.

LeeAnn Wilmoth's family posted a video to Facebook in which they direct a statement towards Ruska.

“We are staying positive, and we believe that our little sister will be coming home. Other than that, Eric if you see this and you have her please, I'm begging you just let her go,” Wilmoth’s brother Gerald Schneider said in the video.

The official document also states that one set of footwear prints were discovered on the shoreline near the boat where tire tracks were lead away from.

“We are very concerned about both subjects. We would like to find both of them. If the public can help us in any way and if they can assist us with any information we would welcome that," Det. Sgt. Peterson said.

Police say if you happen to recognize the missing vehicle, do not approach it, but rather call the authorities immediately.

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UPDATE: July 12, 1:50 p.m. - According to Michigan State Police, the search on Chicago Lake has been suspended at this time due to new information. Law enforcement is continuing their land search.

We'll keep you updated as more details are released.

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ORIGINAL STORY:

A Michigan State Police dive team joined the search Wednesday morning for two missing people in Delta County.

The search for 28-year-old LeeAnn Marie Wilmoth, who recently moved to Upper Michigan, and 37-year-old Eric Scott Ruska, a registered sex offender, has focused on Chicago Lake since early Monday morning. It's a murky 188-acre lake in the Hiawatha National Forest off County Road 442 in northeast Delta County.

Wilmoth told her family she was going fishing Sunday near Munising, and they haven't heard from her since. Wilmoth's family says Ruska's boat was found near the lake's campground. Michigan State Police confirm a boat and a vehicle were found there. Both are being processed in the state crime lab.

Investigators say the two, who worked together in Wetmore, may be traveling in a black 2006 Chevy Colorado pickup truck with Michigan license plate BVB 7631. The truck is reportedly very rusty. The vehicle is listed under Ruska's profile on the state sex offender registry.

Michigan State Police Detective Sgt. Jay Peterson says if anyone sees the vehicle to be careful.

"We're very concerned about both subjects," said Peterson. "We'd like to find both of them. If the public can help us in any way, and they can assist us with any information, we'd welcome that. If they do see that vehicle, we'd ask that they do not approach it and just contact police. They can contact any agency and they'll get that information to us."

Ruska was convicted in 2004 of kidnapping and third-degree criminal sexual conduct for taking a woman from a Limestone Township camp party and holding her for several hours and assaulting her before letting her go.

Ruska was released from prison in Dec. 2015. The state sex offender registry says Ruska now lives in Rumley and works in Wetmore.

Peterson says the dive team is using side scan sonar equipment Wednesday on murky Chicago Lake.

A Michigan State Police helicopter has also been part of the search, along with the Alger County Sheriff's Office, Munising City Police, the DNR, Forest Service, MSP troopers from St. Ignace, Manistique and Negaunee and MSP detectives from Gladstone, Iron Mountain and Negaunee.

Peterson noted this investigation is using significant resources.

"Typically, for a missing person case, we wouldn't allocate these types of resources, but it's become more serious as time goes by and these people haven't been found," he said. "And so we've taken it very seriously and the utilization of resources through our district headquarters has been approved."

Wilmoth's family has started a Facebook page about the search. There's a link to that page in the related links section in this story.

TV6, FOX UP and UpperMichigansSource.com will have continuing coverage as this investigation unfolds.

TV6's Ansley Watson will have a report from Chicago Lake on tonight's TV6 Early News.