Harrington disappeared Oct. 17, 2009, during a Metallica concert on the the University of Virginia campus. Her body was found on a farm in Albemarle County in January 2010.
A sketch of the unidentified suspect in the case was recently revised by the FBI to show he may have changed his appearance, ABC News reported.
The sketches are being posted at bus shelters throughout the East Coast and Metallica has used the images on a video posted on the Internet, The (Norfolk) Virginian-Pilot reported Wednesday.
"Remember, any information no matter how small you might think it is -- could be that crucial piece investigators need to help solve the case," Metallica lead singer James Hetfield says in the video.
The band has offered a $50,000 reward for information in the case, in addition to a $100,000 reward Morgan's parents, Dan and Gil Harrington, have offered up.
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