PHILADELPHIA (AP) — A man already serving a life sentence in one murder case will be heading to trial in the shooting death of an aspiring teacher from Minnesota who authorities say was gunned down for his iPod a month after moving to Philadelphia.

Prosecutors say a grand jury charged 35-year-old Marcellus Jones on Monday with murder, conspiracy, robbery and other counts in the May 2008 murder of 23-year-old Beau Zabel.

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Authorities said Zabel had moved from Austin, Minn., and was scheduled to start work in the public schools.

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Jones was convicted earlier of killing a man police said was the getaway driver in the Zabel killing.

The Philadelphia Inquirer reports that prosecutors presented the new murder case to a grand jury rather than in open court because of concerns about witness intimidation.

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