Metallica has made a public service video as part of a law enforcement publicity blitz to try to catch a man wanted in the death of a Virginia Tech student who disappeared after one of the heavy metal band's concerts.

Composite sketches of the suspect will be featured at bus shelters up and down the East Coast, and a video on the Internet from lead singer James Hetfield urges people to come forward with tips.

"Remember, any information no matter how small you might think it is could be that crucial piece investigators need to help solve the case," Hetfield said in the video, which was on YouTube and an FBI website dedicated to the case.

Morgan Harrington, a 20-year-old aspiring teacher, disappeared after an October 2009 concert in Charlottesville, Va. Her skeletal remains were discovered about three months later in a field about 10 miles from the concert venue.

Her T-shirt was found in front an apartment building near the area. A camera and a crystal necklace she had with her were never located. She was last seen hitchhiking.