EVANSDALE, Iowa — Law enforcement officials in Iowa reclassified the disappearance of two missing cousins as an abduction Friday after an FBI dive team failed to find their bodies in an Iowa lake.

Black Hawk County Chief Deputy Rick Abben told reporters that the divers were confident the girls’ bodies were not in the lake. He also said investigators do not believe the girls got lost because they would have been found by now.

Abben said some evidence in the case has been sent to a state crime lab for analysis, but he did not elaborate.

Authorities also have taken steps to keep a closer watch on the father of one of the cousins, a man with a lengthy criminal history who stopped cooperating with police in the week-old investigation, according to court records.

A judge has ordered Daniel Morrissey, 36, placed in a pretrial supervision program of the Iowa Department of Correction while he awaits September trials in two drug cases. The change means Morrissey, who has been free on bond, will be supervised by parole officers who will make sure he shows up in court and does not violate the terms of his release.

Morrissey is the father of 10-year-old Lyric Cook-Morrissey, who vanished near an Evansdale lake while riding bikes with her cousin, 8-year-old Elizabeth Collins. Their bikes were later found on a path near Meyers Lake.

A special 10-member FBI dive team used sonar equipment on a boat for hours Friday to search the 26-acre lake.

County prosecutor Brad Walz petitioned to place Morrissey under supervision Thursday, the day authorities said he and his wife had stopped cooperating with investigators.