Complex sentence: They manage to kill the second hijacker and Preston, but right after that they discover that Olfin was part of the whole plan since the beginning because she wanted to steal the money Defiance gather to force them take the Earth Republic's funding for the spur.
Split into simpler sentences: They manage to kill the second hijacker and Preston, but right after that they discover that Olfin was part of the whole plan since the beginning. Olfin wanted to steal the money Defiance gathered to force them take the Earth Republic's funding for the spur.