LOUISVILLE, Ky. (WDRB) -- The investigation into the murders of two northern Indiana teenagers is changing.

The Carroll County Sheriff, the Delphi Police Department, the Indiana State Police and the FBI say the number of tips coming in is becoming "manageable" for the investigators involved in day-to-day operations.

Investigators from out of town will return home, but could potentially return to this assignment.

No one has been arrested since Libby German and Abby Williams were found murdered in a wooded area of Delphi in February.

ISP Superintendent Doug Carter stated, "We remain committed to this investigation and the Carroll County and Delphi community until 'this evil' is eradicated."

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