PHILADELPHIA (CBS) — Black Lives Matter held a press conference Tuesday outside of Philadelphia District Attorney Larry Krasner’s office calling for justice. They want the city’s new head prosecutor to take a look at a case they say resulted in a wrongful conviction.

A group of about a dozen demonstrators stood outside of the DA’s office to raise awareness about the case of Eric Riddick, a man doing life for the 1991 shooting of William Callet.

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Credit: Cherri Gregg

The family says he was convicted on the word of a single witness, despite a solid alibi and conflicting forensics.

Last month, a Superior Court judge wrote a statement saying the system failed.

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“Ineffective representation, no representation,” said Eric’s mother, Christine Riddick.

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She has repeatedly sought relief and wants Krasner’s conviction integrity unit to take a look.

“I would like them to expedite my son’s matter,” she said.

The family delivered a package on the case to, DA spokesman, Ben Waman.

Philadelphia Black Lives Matter leader Asa Khalif who endorsed Krasner had this to say.

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“It’s time to pay up on the promises he ran on,” he said.

Credit: Cherri Gregg