Three Cheers For Sweet Revenge

The dark red liquid would ooze out of her mouth before flowing down to her chest where it would merge with the blood that is gushing out of the wound inflicted by the knife that I skillfully plunged into her heart; it would then make it's way down to the recently pollished floor boards and course all the way down the hall ike a crimson river.
Yes, my perfect plan to silence Catherine Brown, a girl from college where we both studied and achieved a degree in forensic science. She used to be my friend until she started hanging around with the most popular kid around: Danny Greenfield. Why do this? I hear you ask, well lets just say she did some pretty horrific things during the last 2 years.

I had been observing her for some time; for example, I knew she always kept the kitchen window open during 1pm and 5pm and she usually ate lunch at 2pm which gave me 1 hour to get inside the house, I am quite skinny so sneaking into the house was fairly easy.
Using the window ledge to hoist myself up I climbed through the window, sofly placing my foot on the tiled floor, careful to make no sound. I cautiously treaded down the hall towards the living room door where I heard the familiar voice of Simba off The Lion King.
I could hear the drumming of my heart beating against my ribcage, trying to escape and that was the moment when I knew: It was finally time to execute my plan, in a few minutes she would come to get her lunch from the kitchen and it would be over.
I heard feet softly tapping on the laminate floor boards and the door slowly creak open, the adrenaline was getting to me as the orgen that allowed life to flow through my body pumped harder and harder, and with a swift movement I thrust my trusty sharp and silver partner that I had used many times before on my prey, into her, penetrating her ribcage piercing her heart and lungs, then ripping through the flesh at the other end. She let out a blood-curdling scream as I took my partner out-making a sickly squelching sound.
Her weak body began falling as the emeralds that she once used to see were slowly closing, showing a mix of fear and anger. The limp, lifeless body was getting closer...and closer to the ground as I let out a deviously evil cackle.
"How pathetic" I smirked.
My partner was gleaming in the crimson liquid, as if marveling in are glory and outside the wind was howling and the rain crashing against the windows, like the Gods were crying.

The deed was done, the neighbours would soon discover the corpse and there would be another investigation.
I was successful again, wonderful, four down, one to go...