(CNN) -- A Nebraska couple missing along with their children since last month surrendered to police and were taken into custody Monday, authorities said in a statement.
The Schade family of Creighton, Nebraska, had last been seen on March 20 in Knox County.
Matthew and Rowena Schade, along with their children, met with Knox County Sheriff Jim Janecek Monday about 10:50 a.m. according to the written statement from Janecek's office.
"The family turned themselves over to law enforcement officers from the Knox County Sheriff's Office and the Nebraska State Patrol," the statement said. "Matthew Schade was arrested on an Antelope County warrant for violation of probation and Rowena is being held on a detainer from the Nebraska Department of Probation."
A determination on the placement of the children, a daughter, 11, and a son, 8, will be made after interviews with child welfare workers from the state Department of Health and Human Services, the sheriff's statement said.
Both Matthew and Rowena Schade were on probation -- he in Antelope County, and she in Pierce County, officials in both counties told CNN. Antelope County Attorney Michael Long told CNN Matthew Schade was wanted for violation of probation and failure to report a change of address.
The Schade family was last seen on March 20 in Knox County. Janecek said they disappeared after an officer went to their home on a domestic abuse complaint.
Knox County is near the Nebraska-South Dakota border. Authorities in both states on Friday suspended a search for the family after a relative told authorities he had spoken with them and they were unharmed.
Authorities thought they might be in Nebraska, after a brush truck they believed the couple stole from a South Dakota volunteer fire department was found abandoned in Antelope County on Friday. A brush truck is a type of small fire truck.
Schade's father, Chet Schade, contacted the Knox sheriff's office on Thursday afternoon. He confirmed he had spoken with all four family members and said they were alive and well.
Searchers had been searching for the family in South Dakota's Black Hills until it was determined the couple possibly made their way back to Nebraska.
Investigators thought the Schades might have gone camping on U.S. Forest Service property in the Black Hills. Schade had visited the area in the past, and law officers found the family's Ford Taurus on Tuesday in Silver City, South Dakota.