Complex sentence: They also discovered that Roth had a brother who was already in prison for murdering a female hitchhiker who had refused to have sex with him, and that Roth himself had a previous conviction for robbery although all but two weeks of his sentence had been suspended.
Split into simpler sentences: They also discovered that Roth had a brother who was already in prison for murdering a female hitchhiker who had refused to have sex with him. They found that Roth himself had a previous conviction for robbery, though all but two weeks of his sentence had been suspended.