Is your school with brain dead people for teachers? Why did he say the sandwich poisoned him and that the school DOES NOT CARE THAT ITS YOUR loving SANDWICH WHY DOES HE HAVE IT. Even bigger,they KNOW he has celiac disease. Is the school bribed by the parents of Fred Assforget?
Idiot Trap to remove Idiotic starfishs.
Get yourself gloves and a knife. Call him and convince him to go at a lake where you know theres an area that once you fall,you can never go back up. Make sure theres nobody at that area other than you and Fred. Tell him to jump into the lake. Grab your gloves. If he jumps,you did it! If he resists,push him back. The gloves will hide evidence. If he brings force,use the knife and kill him.
You can also kill him with the gloves and knife outside of school.