Complex sentence: By playing dead in its cage, Birdie/Ridley managed to lure one of the scientist into its cage were it brutally attacked and kill him, his body is later discovered in Ridley's encloser by Samus, who sensed a dark intelligence at work.
Split into simpler sentences: By playing dead in its cage, Birdie/Ridley managed to lure one of the scientists into its cage were it brutally attacked and killed him. His body is later discovered in Ridley's enclosure by Samus, who sensed a dark intelligence at work.