Short horror story

Okay, so where do I begin?
I guess I should introduce myself, my name is Paul and I make up one-half of a set of twins, my twin, John,  and I share a bond like no other. Being a twin is kind of magical especially in our case we're identical not just in appearance but in every other aspect as well. I'll give a few examples;
- We both have girlfriends named Lucy
- We both are teachers
- We both have sons called Jack, who were born on the same day

These coincidences have plagued our life but have never really bothered me I've always just assumed that it was because we were connected spiritually or something. However, recently I haven't been so sure. I found out a week ago that my twin isn't who I thought he was - I mean he is still my brother but he did something bad... really bad.

I'm not going to beat around the bush so here it is I went onto his computer last week and found a file full of sickening videos of children being raped and murdered by my brother. I'm not going to be graphic but seriously it was fucked up.  I confronted him about it and he seemed shocked and acted like he had no idea what I was talking about. I showed him the videos and he claimed it was just a prank that someone had played on him. He spent the rest of the week avoiding me. So today I took matters into my own hands.

Once again I'll get straight to the point - my brother is currently tied to a chair as I type this. I'm going to interrogate him and find out the truth. I'll document everything that is said right here on this Reddit post.

1PM - Entry #1
ME: John? You awake?
JOHN: What the fuck is going on here? Where am I? What the fuck are you doing?
ME: John, buddy, you gotta tell me the truth about those videos.
JOHN: What fucking videos?
ME: What videos do you think I am talking about? The ones where you killed those kids!
JOHN: Those videos were nothing they meant nothing.
ME: You raped and murdered children! How is that nothing?
JOHN: IF YOU THINK THAT IS WHAT HAPPENED THEN WHY DIDN'T YOU CALL THE COPS?
ME: Because you're my brother. I want to help you.
JOHN: Bullshit. I bet you wanted to join in. Well, the kids are mine so fuck you.

JOHN spat at me. I'll leave him alone for a while and continue this soon.

I remember one time when we were children we found a cat while we were out playing. We were stroking it and then out of nowhere John picked it up and hit its head off of a tree. The poor thing died. John then poked it in the eye with a stick... I guess I understand why he did that now. He was always like this. How could I not see it?

2PM - Entry #2
JOHN: I hate you. I always hated you.
ME: Dude, why are you saying these things?
JOHN: I bet you want me to tell you all about those tapes... you wanna know what those kids tasted like?
ME: Seriously, what the hell? How could you do this?
JOHN: How could I resist... children are just so delicious.
ME: I can't believe this. My own brother is a god-damn child murderer.
JOHN: Don't forget about the rape.
ME: Fuck you.

I had to leave the room. This was making me feel sick. Hearing my own brother talk like that, I don't know what to do. It makes it worse that he is my identical twin it is like looking into some sort of twisted mirror.
When I got my first girlfriend, when I was 16, John ended up sleeping with her. I never held it against her, he convinced her that he was me, we look identical it wasn't her fault. He always told me that he was drunk and didn't know what he was doing, I always believe him but now I'm not so sure. Has my brother always been a twisted psychopath?

3PM - Entry #3
JOHN: *giggling* I can't wait to show you what I did to those kids. I'm going to do the same to little Jack when I get out. I'm going to take your clothes and go to your house. I've done it before. I fucked your wife so many times like that. I kissed Jack goodnight too. I sometimes go into his room while he sleeps and I sneak a look at his little ass. I'm going to fuck him ---

I punched him. I kept punching him. How could even threaten Jack like that? My brother is a monster. I need to end this. I need to kill him.

4PM - Entry #4
JOHN: I'm sorry.
ME: What the fuck is wrong with you?
JOHN: I don't know. I'm sick, Paul, I need help. I need your help. Untie me.
ME: No.
JOHN: Fine. Then tonight your family fucking dies, Paul, I promise you.
ME: You're not my brother. My brother couldn't do this.
JOHN: Oh, I've always been this way. I fucking love it.
ME: I think I have to kill you.

I left the room again. He needs to die, right? I mean someone that fucked up needs to die. People like him are the reason the death penalty exists.  Once when we were twelve I caught him masturbating and he pinned to the ground forcing me to lick his cum. Am I blind? Why am I only remembering all this shit now?

5PM - Entry #5
ME: You need to die.
JOHN: You don't have the guts to kill me.
ME: No, I don't. Instead, I think I'll just leave you here to rot.
JOHN: What if I get out? What if I come for you tonight?
ME: You won't.

I'm going to leave him. He is a monster. This dark, decaying basement in the middle of nowhere is a fitting resting place for a piece of shit like him. I hate him.

5:30PM - Entry #6 - Final Entry
ME: Goodbye, John.
JOHN: See you soon.

You know John and I didn't always fight. One of my happiest memories is from when we were both 20. We decided to go on a road trip together. We threw together a mixtape of some of our favorite songs including Living On A Prayer, Bad Moon Rising and Renegade. We ate fast food every day and took a whole bunch of photos. When we reached our destination John hugged me and told me that he loved me no matter what. I'm gonna miss him.

Now, I ask you, the reader, at what point did I kill Paul and take over writing this piece of shit?
Much love,
John.