Complex sentence: A friend of his told "Unsolved Mysteries" that Liston had been in a car accident a few weeks prior to his death, was hospitalized with minor injuries, and received intravenous medicine.
Split into simpler sentences: A friend of Liston's told "Unsolved Mysteries" that Liston had been in a car accident a few weeks prior to his death. Liston was hospitalized with minor injuries, and received intravenous medicine.