Investigators continue to look for clues in the mysterious death of a woman, found floating in Lake Nickajack in Marion County. The woman's family says they are desperate for answers as well.

The body of 50-year-old Shanna Leigh was discovered by a fisherman early Saturday morning near the Highway 41 bridge. Shanna Leigh's sister, Cynthia, says she is still in disbelief as she sat down to write her sister's obituary Tuesday. She says her family was heartbroken when they got the news of Shanna's passing. In the meantime, investigators are hitting brick walls.

"Right now it is a mystery and we're just trying to get to the bottom of it," says Marion County Sheriff Ronnie 'Bo' Burnett.

Burnett says his department and TBI investigators are working quickly to get to the bottom of 50-year-old Shanna Leigh's death, but so far, no major clues.

"We don't have any leads," says Burnett.

Around 8 o'clock Saturday morning a fisherman spotted Shanna's body and called police. Detectives found her Black Chevrolet pickup truck nearby in Marion County Park in a boat ramp parking lot.

"We went back out there again today and walked it over again, just in case we missed anything."

Burnett says Shanna had not been reported missing and when he sat down with her family, they did not have a clear answer on why Shanna, who lives in Chickamauga, Georgia was almost an hour away from home.

"That was one of the questions we had for the family. What connection would she have for this area?"

Shanna's sister says Shanna liked to ride her motorcycle with friends and passing through Marion County was not unusual. But she says this time, she does not know why Shanna was there.     

"From the way they described her, she was...liked to get out and have a good time, you know, had a good life," says Burnett.

Burnett, along with Shanna's sister, believes someone had to have seen something. The day before she was found, a park manager says he saw Shanna at the campgrounds.

"That Saturday morning I guess there was an estimated 100 trucks with boats. They had a fishing tournament going on. But even the night before the campground was full. There were a lot of people around the whole time," says Burnett.

Burnett is asking anyone, even with the smallest tip, to step forward for the sake of the investigation and for Shanna's family.

"They want answers. And we want to provide them with answers. But we may need help from the public, if there's anybody that has any information about this."

Investigators are being tight-lipped about the condition of Leigh's body. They are not offering any guesses as to her manner of death. Burnett says all they can do is wait on autopsy results from the medical examiner in Nashville