Infact BDR/BGB are very capable at killing their own officers and dumping their bodies in manholes! I'd say it's not strange them coming from the land of Rajakars.
in 2001, BSF the cattle looting force of india intruded inside Bangladesh with help from IA and attacked BDR. In such situation BDR had done right thing fire back and as a result member of indan cattle looting force/IA died.
But comparing that with what happened in Peelkhana massacre proves once again indian hand in killing BDR/army officers as a revange for indian mis adventure inside Bangladesh.