Just found out my ex-girlfriend was murdered.

This is a weird one.
A couple years ago, I dated a girl - I liked her a lot, but ultimately it didn?t work out. I was a bit broken up about it for a while, but ultimately moved on with my life.
Yesterday, I?m reading random articles about my city - something about crime, that mentioned a previous murder in the area - the name was my ex girlfriend. I open the article and immediately I?m greeted by a familiar photo of her face.
From the timing of the article, it happened less than a month after we broke up. The details are beyond horrific. Torture. Multiple stab wounds. Her body found naked in an abandoned building days later. They successfully arrested the individual responsible, and he?s in prison serving a life sentence.
Nobody told me at the time, but nobody had my number (and he stole her phone) and at best I?d met her friends once or twice in a bar. The funeral has obviously been and gone, the court case all wrapped up and everything that can be done has been done.
Except, I?m just hearing about all of this now. There?s just so much to process. The way she died... it?s beyond horrific. I was also, presumably, the last person to date her. We didn?t date for long (4-5 months) but I can?t stop thinking about whether I made her last few months enjoyable. If things might have been different had we still been dating when it happened. Whether I should contact the family at this point, or whether that?s just opening up a wound.
I can?t pretend like we were soulmates, or I ever would have got back together with her. But there?s so much about the way she died that?s haunting me. Nobody deserves that. She didn?t deserve that.
I feel so incredibly guilty that I?ve only just found out. I don?t know how to process it.
Sorry if I?ve posted this on the wrong Forum Section. I didn?t know where to post it. Also, please don?t identify her in this thread if you know what I?m talking about. Seeing the news coverage and the disgusting language used by some newspapers was upsetting in itself. Thank you.
TLDR; Ex-girlfriend was brutally tortured and murdered shortly after we broke up, I?ve only just found out by accident a significant amount of time later and I?m struggling to process it.


Source.