The parents' complaint, presented on Dec. 1, alleged that a substandard building and inadequate rescue efforts led to unnecessary deaths.

12月1号，家长们在诉讼书中称楼舍质量不合格和救援不力导致了不必要的死亡。

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One police official told the BBC that the collapse appeared to have been caused by the use of substandard building material.

BBC: Mumbai building collapse: Indian police arrest nine

George Weightman's firing was the first major military staff change after reports surfaced last month about substandard conditions in a building that is part of the facility.

CNN: Army fires commander of Walter Reed hospital

"Rana Plaza collapsed due to blatant violation of the building code, the use of substandard material and the operation of heavy machinery including generators on the upper floors, " Main Uddin Khandaker, a civil servant who led the panel, said in an interview.

WSJ: Bangladesh Factory Collapse Blamed on Shoddy Materials