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Maureen Faulkner has filed a petition, saying District Attorney Larry Krasner is not fighting Mumia Abu-Jamal's claims police officers and prosecutors traded favors with eyewitnesses during the 1982 trial.
Abu-Jamal's most recent appeal went to the higher court after Krasner said he wouldn't oppose the convicted murderer's appeal in the lower court.
The 65-year-old is serving life behind bars since his death sentence was overturned in 2011.