Black Hawk County sheriff's Captain Rick Abben said that's based on evidence at the scene and the preliminary investigation. However, autopsies are still pending.
Lyric Cook and Elizabeth Collins vanished while riding bikes in Evansdale in July. Elizabeth was 8 and Lyric was 10.
Hunters found the bodies Wednesday in a rural park about 25 miles away.
Local and state police and the FBI joined in a massive search that continued for months after the girls disappeared. No one has been charged in the case.
Evansdale is about 90 miles northeast of Des Moines.
Parents write letter to abductor of missing Iowa girls - Tuesday, November 13, 2012 The parents of two missing Iowa cousins have prepared an open letter to whoever abducted the girls, asking for the children to be freed.
Hunters asked to help look for missing cousins
- Sunday, October 21, 2012Hunters are being asked by law enforcement to keep an eye out for clues pertaining to two missing girls in eastern Iowa.
Authorities say missing Iowa cousins are alive
- Saturday, July 21, 2012 Authorities are refocusing their efforts in locating two missing girls from eastern Iowa.
Search continues for two missing Iowa girls
- Thursday, July 19, 2012 The search for two missing Iowa girls has moved to a landfill and a closer look into the lake near where the girlsâ?? bicycles were found last week.