Complex sentence: On May 31,1964, Charles Schmid decided to murder Alleen Rowe, a high school student living with her divorced mother, because she had stood up one of his friends for a date.
Split into simpler sentences: On May 31,1964, Charles Schmid decided to murder Alleen Rowe. A high school student living with her divorced mother, Rowe had earlier in the year stood up one of his friends for a date.