Let's compare this experience to that of Amir Locke [1]. To summarize: the Minneapolis PD was executing a no-knock warrant in a homicide investigation. Locke was not the target of the warrant but was sleeping on the couch. He was licensed for the firearm and it was completely legal. When startled awake, he reached for his gun (natural reaction) and the police shot and killed him. You'd think the NRA would be all over…
It's relevant because it proves that the guy who was killed already had a lengthy violent criminal record. This helps to build up the case for a self-defense shooting. In most countries past offenses are taken into consideration when prosecuting a wide variety of crimes, meaning this is nothing new.
Also, I have zero pity for someone who raped children, and neither does any jury. Why wouldn't the defense bring it up?