Lionell Dotson's sisters, Katricia and Zanetta, were killed when police dropped a bomb on the Black liberation group's home on Osage Avenue on May 13, 1985.
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In total, 11 people died. The girls were 14 and 12.
Dotson was given the remains of his two sisters back in August.
Philly releases remains of 2 MOVE bombing victims to family
In the lawsuit, Dotson alleges that Katricia's remains were treated as scientific specimens at Penn Museum.
Last year, it was discovered that the Philadelphia's Medical Examiner's Office had some of the girls' remains.
SEE ALSO: Philly releases independent report on mishandling of MOVE bombing victims' remains
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Then-Health Commissioner Dr. Thomas Farley resigned in 2021 after admitting he arranged for the cremation and disposal of the girls' partial remains in 2017 without notifying family members.
Days after that announcement, the remains turned up in the medical examiner's office.
Officials from both the city and Penn told Action News they don't comment on pending litigation.
SEE ALSO: MOVE members demand answers on missing children's remains