As people head out to cookouts and parties for Memorial Day Weekend, police are on the look out for drunk drivers.
Checkpoints will be held across the state this weekend.
Jamie Costello joined the Harford County Sheriff's office as they stopped traffic Friday night.
With them? A mother whose daughter was killed by a drunk driver.
Janet Hardy was just 13 years old when she was killed.
Deb Hardy said she joins police to help make sure that other lives aren't lost.