Skin of His Teeth (Aftermath)
It had been three weeks since Bart's death, and Lisa hadn't been feeling any better. She was plagued with constant guilt. All the horrible things that she did to him just made her feel like shit. She felt low, and her behavior over those three weeks really showed it. She just stopped talking to everyone, even her parents, and didn't bother in school anymore. She was shit, and shit didn't deserve to be happy. She knew what she had to do.
She left her room after leaving a note on her bed, and went to the same cliff where she disposed of Bart's body…or what was left of it. She and Bart argued a lot, but she loved him. Bart was her brother and was always there when she needed him, and this is what he got. 'He didn't deserve this, but I deserve this!' Lisa thought before she jumped off of the cliff. She felt the rocks hit her skin and break her bones. She cried all the way down, knowing that she was probably going to hell for the atrocity that she committed against her own family. When she finally landed on the bottom, she was impaled by a sharp rock on the bottom of the cliff, and laid there for minutes before she ran out of blood to bleed.
The next morning…
Marge went to Lisa's room to wake her up. She had been really worried about Lisa for the past couple of weeks, but she thought that it would get better and that she was just sad about Bart's disappearance. When Marge went in, she found that Lisa wasn't in her room. While she was looking around the room, she saw the letter that Lisa had left on her bed before she left. Marge read it, and started crying. Hoer came in upon hearing his wife crying, and saw the letter. He had pretty much the same reaction as Marge did, and called the police.
Dear Mom and Dad,
I can't live with this guilt anymore. Bart didn't disappear; I accidentally killed him, and destroyed his body so that only his skeleton remains. He is at the cliff on the edge of town. I'm sorry for all the pain I've caused you two. You two don't deserve it, Bart didn't deserve this, and I hope to God Maggie doesn't know what happened.
I never thought I would do something like this, but I was only thinking of myself when I mutilated his body. I should have called someone, I should have done more to help him. I should have been thinking of someone other than myself. If you hate my guts, I don't blame you, I hate my fucking guts too. It's a shame that a life that had so much potential had to ended because of someone's selfish desires.
I plan on jumping from the cliff I threw what remained of Bart's body off of, in an attempt to feel even a shred of the pain I've caused so many people. Tell everyone that I'm sorry, and I hope that if you don't forgive me now, then you will later.
I love you all, Lisa
Three days later…
The police were able to find Lisa's body impaled on the rock, and Bart's skull and some bones surrounding the body. They were only able to find 40% of Bart's body possibly due to animals grabbing some of the bones. A funeral was held for both of them at the local cemetery. People were shocked that Lisa had done something as heinous as this, but were unsure of whether to forgive her or not.
On this day, Lisa and Bart Simpson became a fleeting memory as people had to attend to their own lives. Eventually, the Simpsons had to work on raising their only child, Maggie, who never got to know her older siblings, or what her sister did. It all became nothing more than a memory.
So, I wanted to make the repercussions of Lisa's crime. She actually does feel remorse, and this isn't just about her. She feels bad for everyone she assumes were made miserable by Bart's death, and how selfish and stupid she was for doing what she did to Bart.
In the actual episode, the killer only got 12.5 years in prison for involuntary manslaughter and abuse of a corpse. He claims he feels awful about what he did, but, who really knows.