Complex sentence: He goes to the Lincolns' home and returns the 22 rifle, and as they taunt the police chief with subtle talk of the murders, Jesse makes it clear that he knows they are the killers.
Split into simpler sentences: He goes to the Lincolns' home and returns the 22 rifle. As they taunt the police chief with subtle talk of the murders, Jesse makes it clear that he knows they are the killers.