Dad's Life Insurance Was In My Mom's Name, Now It's Not.

So unfortunately my dad died on February 19th at 11:30pm, 30 minutes shy of his birthday. He died at his current wife's house and they were only married for two years. It originally was deemed an accident however after further developments, the investigators and my whole family believe it was no accident at all, but that's a topic for a later story.

Before he died he reaffirmed to us that the life insurance policy was still in my mom's name because he wanted the house to be paid off and put in my name. Keep in mind that when he and my mom divorced, he put in the legal document that he wanted his life insurance to go to my mom. The day after he died (the 20th) my uncle and aunt went up to the university where he worked and asked about the life insurance policy to make sure it did not change and they said it had not and it was still in my mom's name and requested her to go there to get the process started.

Fast forward to the 27th, the day before my dad's funeral my mother went with my uncle to the university like they requested, and the university told her that now, his current wife is walking away with $240,000 from life insurance, and an additional $80,000 from the university and my mom isn't listed anywhere except only for his retirement.

We don't know how it would have changed in that short of a timespan, and we know that he wouldn't leave us high and dry like that because he told everyone including me and my mom that he hated his current wife and when he retires he was going to go back to my mom and get away from his current wife who had threatened him many times on recorded phone calls and even shot at him on occasion.

I promised him at his casket that I would not give up and I would not let her win, because we all believe that she killed him (including the lead investigator) by pushing him, causing him to fall off their porch and break his neck.

I have no idea where to start.

UPDATE (3/3/25):

We contacted the insurance company and they corrected everything. It does look like she tried to change it though after my dad's death. So as much as it hurts to think about everything looks like it was foul play for monetary gain. For those interested I'll update on what happens when the authorities bring her in, which I heard they wanted to bring her in today.