VALPARAISO, Ind. -- Porter County officials are offering a bounty for tips about drunken drivers over Memorial Day weekend.

"I hope it encourages people to call the police when they see unsafe driving," said Michael Grennes, chairman of the Porter County Drunk Driving Task Force.

The tip-line was operating last Memorial Day weekend, too. County officials say four people reported drunken drivers and claimed their rewards.

Besides offering the rewards, the task force is paying for police departments throughout Porter County to have extra officers out whose sole responsibility is to look for drunken drivers.