TIFU by getting into a relationship with a girl whos the daughter of a man who was involved in my dads murder

Quick flashback I was 5 when my dad was murdered in front of me in cold blood, it was intentional, I am now in my 30s. So I meet a girl at a Giant EDM festival (EDC pre covid) in a different state and she was amazing , Blue eyes, blonde hair , funny, energetic a Perfect female for me. We hit it off and all has been well until three nights ago.

While out having dinner we decide to share stories of our past and families. She begins telling me her dads story and it was strangely a similar to my own, and so the odd vibe continues. I ask more questions, as does she and its confirmed without a reasonable doubt our dads knew each other down to the neighborhood they both lived in. It gets better... She asks if she may text her dad and ask how does he know my dad by name, I agreed and she did. daddy starts blowing up her phone “Where are you, who are you with, whos asking, are you ok” etc. panic questions she begins to cry and says “Daddy I’m fine but do you know this man?” He says Yes I do. She then puts him on speaker phone and He tells her “baby remember when I told you daddy was arrested for witnessing a murder? Well thats the murder I was there in the car when they opened fire and I saw that young man your with in his dads car”

She bursts into tears and i grab her phone while shes panicking and ask him “so you know me? I have one question, did you kill my father?” He said “No I didn’t but I was with the people who did and I was also very young mod teens I was at the wrong place at the wrong time”. My anger went thru the roof and the girl was flipping on her dad also. I call my mom and ask about the guy and she was shocked he was present because she knew him personally . SMALL WORLD! but he was apologetic and said he was not involved in planning or even in execution he was just there with no knowledge. Convo ended, bill paid I took her home and next morning we had breakfast to clear the air. We are still dating but she no longer speaks to her father.

TL;DR Started dating a girl who’s father was a witness to my fathers murder when I was 5 years old