My Mom Just Died From A Gun Shot And I Don’t Believe She Did It To Herself.

Last month I went downstairs and saw my mother… So around 10:30 pm on Wednesday I heard my mom and step dad laughing and having a good time in the room watching tv, then I fell asleep and not even 10 to 15 minutes later I wake up to my step dad screaming and doing downstairs and I just thought they were fighting again so I shot out of bed and yelled “shut the fuck up for once in ur life’s!” Then I threw on my blanket and went downstairs and saw my step dad on his knees saying that “my wife shot herself! 911 911 I need to call 911!” And then I saw my mom on her side. It looked like she was layed down not like a person who got shot herself, and keep in mind I’m young and I called the cops. She ended up passing and they refused to tell me and had my father tell me over the phone at 3 am. And I’m mad also bc at her funeral a few days ago I asked if him I could see my mothers body alone and he told me “that’s my fucking wife” and I was mad as hell bc he stood over my shoulder as I looked at her. That’s my mom. I saw her dying on the floor. And he did nothing. And she had no will and she just sold our house for 300k.. he just cashed in over a half a million dollars. Please give me advice on what I should do bc no one will believe me. I know the woman too well, she told me she would take him out before she would do it to herself. The gunshot was in her stomach. Not her head like she told me she would. No one will believe me. They only believe him! Location: Minnesota