Complex sentence: After he was shot by Anslo Garrick, he reignited his relationship with his former fiancée, Audrey Bidwell; she was killed by Mako Tanida, after which Ressler learned she was pregnant with his child.
Split into simpler sentences: After he was shot by Anslo Garrick, he reignited his relationship with his former fiancée, Audrey Bidwell. Unfortunately in "Mako Tanida" she was killed by Mako Tanida, after which Ressler learned she was pregnant with his child.