"48 Hours Suspicion": The Case Against Mary Katherine Higdon

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(upbeat music) - It's August 1st, 2018. I get a call from one of my investigators. Said we had a shooting victim on Sunday Book Drive and it didn't look good. (upbeat music) - From County 9-1-1, where's your emergency? - I mean, yes ma'am, I actually had my gun with paper and I'm so, so, hey, it's like this time of the night. (upbeat music) - We actually had the perpetrator admitting to shooting the victim on the 9-1-1 call before we even arrived at the scene. And she told us she didn't. (upbeat music) - Are you serious? - Ma'am, please bring someone right now. - I am there, I'm the lead. (upbeat music) - And boys, look at me, and even look at me. Look at me, see that. I'm Lieutenant Chris Wilson. I was the first investigator to rival scene. - What kind of gun was it? - It was a gun, what do you think I'm just grabbing it? I just, I just, I just, I just, I just, I just, I just, I just, I just, I just, I just bring it to our side. - Basically, we had a young man down, not responsive, and also a young woman who was frantic, very emotional. So he was just pleading for help. (upbeat music) - Will, come on, come on man. Come on, come on, come on, come on man, come on man, come on. - I don't know, I just, I don't even know that he's standing down. - The gun going off, I don't even see how like, it even got him because I wasn't even like, really pointing it directly at him in the first place. - I was able to look over any type of evidence, any type of forensic, 'cause they could have been involved. Trying to make sense of what might have happened in that living room that night. - I'd like to be in a fight with him. - I'd like to be in a fight with him while you move him. - I knew then that we could be possibly looking at a homicide. - Did you have the right for my sound left? - I didn't, I didn't think of it, I didn't think of it. (dramatic music) - The confessions on this video,
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A young woman says she accidentally shot her boyfriend. Police say she confessed to murder – but there’s no audio to prove it. What will the jury decide? CBS News correspondent David Begnaud reports.