A major reward is being offered for tips that could solve a 10 month old double homicide investigation.
A $10,000 reward is now in place for information leading to a conviction in the late November murders of Robert and Colleen Grube.
The father and daughter were killed inside their Fort Recovery area home.
Investigators have already combed through nearly 300 tips. However, law enforcement officials are hoping the money will lead to more information.
Detectives now believe the Grube's were not random victims but for some reason were targeted.
Forensic evidence suggests at least two people were involved in the crime-- one man and one woman.
The reward money was first announced Thursday. Since then the department has received new tips. The money was donated by area community members.
Tips including anonymous ones can be made by calling the Mercer County Sheriff's hotline at 567-890-8477