Bad management - CTA/CRA IQVIA Employee Review

I worked for IQVIA as a CTA for about a year and a half. It was fantastic and decided to become a CRA. After a year of being a CRA, they decided to fire me for an SOP violation I had when I was three months into my CTA role, AFTER my promotion and three raises. I had a minor misdemeanor. I paid a fine and never did jail time or otherwise. It did not affect the company at all. I had good metrics and was a good worker, yet they fired me for not informing HR of the misdemeanor. Right before the holidays too.