Authorities in Orange County are ramping up their efforts to close the unsolved death of Megan McDonald as a new clue emerges 19 years later. 

State police joined law enforcement volunteers in Wallkill and Middletown Monday to pass out flyers about a new $10,000 reward. 

McDonald was the daughter of a retired NYPD homicide detective. 

She was bludgeoned in 2003 in Wallkill after a night with friends, in what police say was deadly intimate partner violence. 

Authorities say they’re working on a new lead from a witness who saw McDonald's car the night she died with a dark-colored Honda-type hatchback that had a loud sound system in it. 

“We know there are less than a handful of individuals who have information about this homicide, and we know who you are. The individual who committed this horrific crime is the only person responsible and your lives have been affected by this too. We are asking you to speak up for Megan," says NYSP investigator Brad Natalizio. 

The FBI is also offering a separate $10,000 reward in the Megan McDonald case. 

Anyone with information is asked to call state police.