Reason for Murder: "I Don't Like Mondays"

In 1979, 16-year-old Brenda Spencer opened fire on Grover Cleveland Elementary School from her home, killing two adults and injuring nine others. When asked why, she infamously said, “I don’t like Mondays.” She was given the rifle as a gift by her father despite warnings about her mental state. Spencer was sentenced to 25 years to life and remains in prison, repeatedly denied parole.