"Set fire to the apartment" "Then chloroform yourself"
So by the time the cops talk to me I'll be extra crispy?...
but if you really had to get out of that mess, spray ammonia all over the aparment and the body after cauterizing your own wound. you would only have a few hours, since her parents would probably come looking for her, so you would have to head over to the little kids place to eliminate the witness, put on gloves, break his neck and put the body at the bottom of a flight of stairs. quickly hunt for a neighbor that resembles yourself in stature, kill them in whatever method would be unrecognizable from the skeleton, and leave the body in the apartment. then burn down your apartment using your oven or some other appliance to make it look like an accident and gtfo the country.