The main purpose of this legislation, known as the "Justice for Fallen Law Enforcement Act," is to strengthen penalties for crimes committed against law enforcement officers. It aims to deter violence against these officers by imposing harsher sentences for those who murder or assault them. Key provisions of the law include new penalties for individuals who commit serious assaults against law enforcement officers. Specifically, if someone seriously injures a law enforcement officer using a weapon that has crossed state lines, they will face a minimum prison sentence of 20 years.