Complex sentence: When at 9:00 PM, Guerrero's father José arrived at the art academy to take his son home, but then discovered that his son never showed, he also then found that he wasn't at home either.
Split into simpler sentences: When at 9:00 PM, Guerrero's father José arrived at the art academy to take his son home. But then José discovered that his son never showed, he also then found that he wasn't at home either.