FOND DU LAC - Fond du Lac authorities say they may be getting closer to making a cold case arrest.
Officials are hoping for help from the public to solve the decades-old mystery of Berit Beck.
"We're hoping that somebody out there remembers," said Sheriff Mylan Fink, with the Fond du Lac County Sheriff's Office.
There's still no arrest in Berit Beck's homicide. She was last seen alive in July 1990.
The 18-year-old was on her way from Sturtevant south of Milwaukee to Appleton for work.
She never made it, and her body was later found more than a month later in a ditch in rural Fond du Lac County near Waupun. An autopsy determined she had been asphyxiated.
[caption id="attachment_21870" align="alignleft" width="300"] Investigators remove Berit Beck's van from a Fond du Lac parking lot in 1990. The Sturtevant woman was on her way to Appleton for work, but never made it. Her body was later found in a ditch near Waupun. (WLUK file image)[/caption]
Fond du Lac investigators say they have evidence and a suspect in Beck's death.
But they say despite the breaks in the case, there are still some questions that need to be answered.
"It was the first time I thought we had tangible physical evidence to intimately put someone into the interior of that van," said Fink.
Investigators say a 60-year-old truck driver from Kenosha is their prime suspect. They say he was inside the van Berit Beck was driving the day she disappeared.
However, that man has not been arrested, or charged.
"Seventy pieces of evidence have been submitted with this case so far," said Lt. Cameron McGee with the Fond du Lac County Sheriff's Office.
The evidence includes pictures of the Kenosha man's hands, one of which is deformed.
"One of the things in discussing with the crime lab we learned that having photographs of this individuals hands would help them in analyzing some of the physical evidence that's already in possession of the sheriff's office," said Eric Toney, Fond du Lac County district attorney.
Officials would not give anymore details on the evidence they've collected, but said, they are making progress.
[caption id="attachment_21883" align="alignleft" width="300"] Fond du Lac County authorities hold a news conference April 7, 2014, to announce a new lead in the investigation into the 1990 homicide of Berit Beck. (WLUK/Gabrielle Mays)[/caption]
"There is also numerous other follow up interviews that are taking place and follow up witnesses are continuing to be contacted," said McGee.
FOX 11 talked with Berit Beck's mother Diane Beck on Sunday.
"After this amount of time it's kind of shocking. For once it feels different than everything before. It's making us feel more confident that we're about to move ahead in this investigation."
Investigators say they've never given up on the Beck case.
"Back then we viewed that case as a bold strange abduction. It has been a nightmare since the day it happened," said Fink.
And investigators are still looking for answers to help them solve the case.
"If somebody knows something they need to come forward and tell us we need their help," said Fink.
If you have any information on the Berit Beck case you're asked to call the Fond du Lac Sheriff's Office crime tip line. The number is (920) 906-4777 and remember, you can remain anonymous.